Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
On 9/14/2015 2:59 PM, FBMBoomer wrote:
On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. -- Rick |
#2
![]() |
|||
|
|||
![]()
On 9/14/2015 4:15 PM, rickman wrote:
On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. The government sent me to college on their dime. The intention was for me to be a civil service employee for the rest of my life. I never was able to use all the stuff I learned in physics. I did use a lot of the math. They put me to work after college programming the fire control systems for FBM submarines and the targeting program for each warhead. It was horrible dreary work that had to be done on a strict time line while a boat was in port. All machine language. It was a nightmare that I finally left to work for Raytheon. They were not happy about the investment they made in me. I had signed no contract. |
#3
![]() |
|||
|
|||
![]()
On 9/16/2015 4:54 PM, FBMBoomer wrote:
On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. The government sent me to college on their dime. The intention was for me to be a civil service employee for the rest of my life. I never was able to use all the stuff I learned in physics. I did use a lot of the math. They put me to work after college programming the fire control systems for FBM submarines and the targeting program for each warhead. It was horrible dreary work that had to be done on a strict time line while a boat was in port. All machine language. It was a nightmare that I finally left to work for Raytheon. They were not happy about the investment they made in me. I had signed no contract. I did a little work on sonar for TRW. I got just enough of a taste to understand how difficult it could be. But most of the difficulty came from the circumstances and restrictions imposed rather than the basic work. I got a little knowledge on the EMSP. I seem to recall it never reached deployment, but I find Internet references to it being the standard acoustic platform at some point. I can't imagine 1980's technology would be used even in 2000, much less now. I guess they did some upgrades before it reached production. -- Rick |
#4
![]() |
|||
|
|||
![]()
"rickman" wrote in message
... I did a little work on sonar for TRW. I did a little work on power steering for TRW and was disturbed by their attempting to debug their software purely on the CANBus messages that came out; hardly a professional approach for such a safety-critical car component. |
#5
![]() |
|||
|
|||
![]()
"gareth" wrote in message
... "rickman" wrote in message ... I did a little work on sonar for TRW. I did a little work on power steering for TRW and was disturbed by their attempting to debug their software purely on the CANBus messages that came out; hardly a professional approach for such a safety-critical car component. OK, let's hear the bad news: what sort of vehicles have you bodged the steering software on? -- ;-) .. 73 de Frank Turner-Smith G3VKI - mine's a pint. .. http://turner-smith.uk |
#6
![]() |
|||
|
|||
![]()
On 9/16/2015 5:30 PM, rickman wrote:
On 9/16/2015 4:54 PM, FBMBoomer wrote: On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. No, QM was NOT well understood in 1968. While we have a better understanding now, physicists even now don't claim it is "well understood". There are still way too many unknowns and unproven theories. snip -- ================== Remove the "x" from my email address Jerry, AI0K ================== |
#7
![]() |
|||
|
|||
![]()
On 9/16/2015 10:30 PM, Jerry Stuckle wrote:
On 9/16/2015 5:30 PM, rickman wrote: On 9/16/2015 4:54 PM, FBMBoomer wrote: On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. No, QM was NOT well understood in 1968. While we have a better understanding now, physicists even now don't claim it is "well understood". There are still way too many unknowns and unproven theories. Really? What parts of QM that relate to photons vs. waves are not well understood or even not well understood in '68? -- Rick |
#8
![]() |
|||
|
|||
![]()
On 9/17/2015 1:17 AM, rickman wrote:
On 9/16/2015 10:30 PM, Jerry Stuckle wrote: On 9/16/2015 5:30 PM, rickman wrote: On 9/16/2015 4:54 PM, FBMBoomer wrote: On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. No, QM was NOT well understood in 1968. While we have a better understanding now, physicists even now don't claim it is "well understood". There are still way too many unknowns and unproven theories. Really? What parts of QM that relate to photons vs. waves are not well understood or even not well understood in '68? Quantum entanglement, for instance. Symmetry, for another. In fact, much of quantum mechanics is not well understood. -- ================== Remove the "x" from my email address Jerry, AI0K ================== |
#9
![]() |
|||
|
|||
![]()
On 9/17/2015 6:47 AM, Jerry Stuckle wrote:
On 9/17/2015 1:17 AM, rickman wrote: On 9/16/2015 10:30 PM, Jerry Stuckle wrote: On 9/16/2015 5:30 PM, rickman wrote: On 9/16/2015 4:54 PM, FBMBoomer wrote: On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. No, QM was NOT well understood in 1968. While we have a better understanding now, physicists even now don't claim it is "well understood". There are still way too many unknowns and unproven theories. Really? What parts of QM that relate to photons vs. waves are not well understood or even not well understood in '68? Quantum entanglement, for instance. Symmetry, for another. In fact, much of quantum mechanics is not well understood. But what does any of that have to do with the duality of EM radiation? -- Rick |
#10
![]() |
|||
|
|||
![]()
In rec.radio.amateur.antenna rickman wrote:
On 9/16/2015 10:30 PM, Jerry Stuckle wrote: On 9/16/2015 5:30 PM, rickman wrote: On 9/16/2015 4:54 PM, FBMBoomer wrote: On 9/14/2015 4:15 PM, rickman wrote: On 9/14/2015 2:59 PM, FBMBoomer wrote: On 9/9/2015 11:14 AM, gareth wrote: "Wayne" wrote in message ... "gareth" wrote in message ... 1. For those who suggest that RF transmissions are made up of photons, what is the amplitude envelope of each photon, and for how many cycles does it exist? Consider this. Waves and photons exist in visible light at any frequency. If the frequency is lowered below the visible spectrum all the way down to say, 1 MHz, at what point do the photons disappear? Or do they just get weak? Photons exist in visible light at MANY frequencies where such frequencies are generated by the transition of an electron to a lower energy orbit around an atom. What is the mechanism by which your photons at 1 MHz are created? I am not arguing with you Gareth. I think I am agreeing. I am lacking in theory. I freely admit that. I am going on common sense. Photons, light move through our atmosphere in a straight line unless reflected by air temperature layers or mirrors. EM radiation moves through our atmosphere in a more complex way. It is reflected by our ionosphere or might be absorbed by something. How is that different between light and other EM radiation? Radio waves are absorbed, refracted and reflected. Light waves are absorbed, refracted and reflected. The mistake (of many) that Gareth is making is in thinking that photons and waves are created separately and differently. *All* EM radiation can be viewed as photons or as waves depending on the nature of the observation or interaction. It does not matter how they were generated, they are just two ways of viewing the same thing. Consider the view of a train from along side the railroad tracks. It is long and moving fast. The same train as viewed from in front is not long at all and instead of looking like it is moving, is getting larger. This is just an analogy of course, but it shows that the two views reveal different perspectives on the same thing. It doesn't matter how the train came to be there, just how you look at it. My receiving antenna is a shielded loop. The antenna itself is copper and then it is covered with an aluminium shield that is grounded to stop the electrical part of the EM transmission. This guarantees that I will not receive any light/photons from my antenna. I'm not sure what you are trying to say. I don't know of loop antenna that *are* sensitive to light??? It simply makes no sense to me that I am receiving any information via light. I would love to hear a simple explanation that explains to me why my inverted V on 75 meters is emitting photons/light when I put 1500 watts of power to it. I remember years ago in physics class that this discussion came up in my college classroom. The professor told us that EM transmission was completely different than the transmission of light. It had occurred to me that if we built a transmitter on a frequency of visible light that somehow light would be emitted from the antenna. He said that there would be EM transmission but no light. I accepted his opinion because he knew far more than myself. Tell me how light is emitted in waves? How is that different from transmissions of radio waves? Is light always particles? If so, how do you explain diffraction? If light can be waves, how then can it be a particle? The exact same source of light can be viewed as particles or as waves. Your professor was clearly wrong. I'm amazed he was teaching college. I have accepted that explanation since 1968 when he was teaching that class. What I hear being said here is that EM transmission is composed of photons. I always thought of it as a simple electromagnetic wave, like what we use in transformers and radio communications every day. The issue is *not* are EM waves composed of photons. The issue is do you "see" EM waves as photons or as waves? This depends on your method of observation. Microwave ovens generate radio waves. Yet they are absorbed as quanta by exciting the water molecules. Emitted as radio waves, yet absorbed as photons... Again, what I hear being said here is that radio waves are just lower frequency light waves. Really? Not looking for a flame war, just a simple answer to my question. Yes, radio, microwaves, IR, visible light, UV light, x-rays, gamma rays are all just one continuous spectrum of the exact same phenomenon, existing as both waves and photons regardless of frequency or manner of creation. Anyone who tells you differently does not understand EM radiation... including your prior professors. I believe it now Rickman. I have had two clear explanations sent my way. I cannot fault my college professor. It was 1968 and perhaps when he was educated there was a clear delineation between light and EM radiation. He was a good man and taught me a lot about astrophysics. That was something he had a good handle on. The rest of us students were struggling. I understand what you are saying. However, QM was well understood in 1968. It is mostly the advancement toward the combination of QM and gravity that has been worked on in the intervening years, with not much progress really. It's a tough job. No, QM was NOT well understood in 1968. While we have a better understanding now, physicists even now don't claim it is "well understood". There are still way too many unknowns and unproven theories. Really? What parts of QM that relate to photons vs. waves are not well understood or even not well understood in '68? Compton, A. (1923). "A Quantum Theory of the Scattering of X-rays by Light Elements" Physical Review 21 (5): 483-502 Pretty much the end of the discussion as to whether or not the photon nature was real. -- Jim Pennino |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Do antennas radiate photons? | Antenna | |||
Photons | Antenna | |||
Photons | Antenna | |||
Minimum photons-per-second [amplitude] required for 150 KHz? | Antenna | |||
Minimum photons-per-second [amplitude] required for 150 KHz? | Shortwave |