Cecil Moore wrote:
Rectifier wrote:
Radiation has no mass ...

On the contrary, radiation is photons which indeed
do have mass when traveling at the speed of light,
which radiation does.

According to Einstein, anything with energy has mass equivalence -
especially photons. But other than that, nothing with mass can travel
at the speed of light. You can have one, or the other, not both.

73, ac6xg

Jim Kelley wrote:
... You can have one, or the other, not both.

73, ac6xg


Yanno', when I run that "equation" backwards, and then again forwards, I
have a real hard time telling the difference ... you suppose it is just
our "perceptions" which create the difference(s)? LOL

Indeed, this may be a plausible avenue to explore ... in that, our radio
signals are neither photons nor waves ... well, at least during their
"complete journey." Perhaps they "wink into mass" and then "wink into
energy", we are just too slow to notice the changes! LOL

Remember, there are/is those exceptions where the, final, truth may be
stranger than fiction ...

Regards,
JS

On Sep 16, 7:48*pm, Jim Kelley wrote:
Cecil Moore wrote:
Rectifier wrote:
Radiation has no mass ...

On the contrary, radiation is photons which indeed
do have mass when traveling at the speed of light,
which radiation does.

According to Einstein, anything with energy has mass equivalence -
especially photons. *But other than that, nothing with mass can travel
at the speed of light. *You can have one, or the other, not both.

73, ac6xg

True, travel is something less than the speed of light
Art

"Art Unwin" wrote in message
...
On Sep 16, 7:48 pm, Jim Kelley wrote:
Cecil Moore wrote:
Rectifier wrote:
Radiation has no mass ...

On the contrary, radiation is photons which indeed
do have mass when traveling at the speed of light,
which radiation does.

According to Einstein, anything with energy has mass equivalence -
especially photons. But other than that, nothing with mass can travel
at the speed of light. You can have one, or the other, not both.

73, ac6xg

True, travel is something less than the speed of light
Art

-

In what medium? Remember that the speed of light is different in different
media.

Jim Kelley wrote:
According to Einstein, anything with energy has mass equivalence -
especially photons. But other than that, nothing with mass can travel
at the speed of light.

Make that "nothing with *rest* mass can travel at the
speed of light". From an earlier posting of mine:

"Photons have zero rest mass. Otherwise, they couldn't
travel at the speed of light."
--
73, Cecil http://www.w5dxp.com