"Rectifier" wrote in message
om...

"Art Unwin" wrote in message
...
On Sep 16, 4:32 pm, Cecil Moore wrote:
Rectifier wrote:
You are applying laws that apply to objects with mass to
electromagnetic radiation, which has no mass.

Photons have zero rest mass. Otherwise, they couldn't travel
at the speed of light. But photons traveling at the speed
of light certainly have mass. Where in the world did you
get such irrational ideas?

I have an Engineering Physics degree from a university program that is
an ABET certified engineering program.

After your latest posting, they may de-certify your university's
program. Exactly what university was it that taught you that
photons traveling at the speed of light have zero mass?
--
73, Cecil http://www.w5dxp.com

Cecil, this sounds like a regular poster David.Perhaps he is pulling
your leg with his nonsence
Art

-

No. I'm not David; and I just started posting here. I'm not trying to
pull anyone's leg with nonsense. I'm trying to participate in a
discussion where people have different perceptions and understanding of
physics. Isn't that what causes us all to learn and/or change our
perceptions on occassion? It seems that the last vestage of a lack of
answers to a point is to mount a personal attack. Your refusal to answer
the salient point and instead mount a personal attack means your ability
to listen is totally stopped. Discussion over.

Hmm. Seems to move that the old wave/particle duality thing comes into play
in this instance. A wave has no mass, agreed? So, if we collapse the wave
function, the photon (a particle by popular concensus) loses its velocity,
which means, you guessed it, no mass.

Ed, NM2K

Ed Cregger wrote:
A wave has no mass, agreed?

Not agreed. An EM wave possesses momentum per unit volume
from which the mass of the wave can be calculated.

A container of light has more mass than a similar
container that does not contain light.

EM waves certainly have mass that can bend a comet's
tail away from the sun.
--
73, Cecil http://www.w5dxp.com

"Cecil Moore" wrote in message
...
Ed Cregger wrote:
A wave has no mass, agreed?

Not agreed. An EM wave possesses momentum per unit volume
from which the mass of the wave can be calculated.

A container of light has more mass than a similar
container that does not contain light.

EM waves certainly have mass that can bend a comet's
tail away from the sun.
--
73, Cecil http://www.w5dxp.com

Do you know that the sun puts out a lot of neutrons and other particles?
It's not the light that bends the comet's tail.

Rectifier wrote:
It's not the light that bends the comet's tail.

If the sun put out nothing except EM waves, what
would a comet's tail look like? I suggest you
read Eugene Hecht's section in "Optics" titled:
"3.3.4 Radiation Pressure and Momentum" in my
4th edition.
--
73, Cecil http://www.w5dxp.com

"Cecil Moore" wrote in message
...
Rectifier wrote:
It's not the light that bends the comet's tail.

If the sun put out nothing except EM waves, what
would a comet's tail look like? I suggest you
read Eugene Hecht's section in "Optics" titled:
"3.3.4 Radiation Pressure and Momentum" in my
4th edition.
--
73, Cecil http://www.w5dxp.com

You cut off the first line of my post, "Do you know that the sun puts out a
lot of neutrons and other particles?" I didn't say the sun puts out nothing
except EM waves.

Rectifier wrote:

"Cecil Moore" wrote in message
If the sun put out nothing except EM waves, what
would a comet's tail look like? I suggest you
read Eugene Hecht's section in "Optics" titled:
"3.3.4 Radiation Pressure and Momentum" in my
4th edition.

You cut off the first line of my post, "Do you know that the sun puts
out a lot of neutrons and other particles?" I didn't say the sun puts
out nothing except EM waves.

I am asking you: What if the sun put out nothing except
EM waves. Would comets still have a tail or not?
--
73, Cecil http://www.w5dxp.com

I am asking you: What if the sun put out nothing except
EM waves. Would comets still have a tail or not?
--
73, Cecil http://www.w5dxp.com

Are you talking about the ion tail or the dust tail? The dust tail is
affected by EM; but the ion tail is affected only by magnetic forces.

http://www.ifa.hawaii.edu/~jewitt/tail.html