I've read much more than a simple Wikipedia article. And the only thing
I can come up with is that physicists can't explain the why either -
just that it's the way the math works out.
You just don't get it. A photon has no rest mass. It only has it's
engergy. If it had rest mass and had to be accelerated to the speed of
light not only could it not accelerate to c, it couldn't accelerate
instantaneously to *any* speed.
The only mass a photon has is that which is equivalent to its energy, E
= mc^2.
I understand it has no rest math. But where does the mass come from?
There has to be mass to exert pressure. Does the mass just appear from
nowhere? I doubt it...
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Remove the "x" from my email address
Jerry, AI0K
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