On 10/9/2014 7:10 PM, rickman wrote:
On 10/9/2014 5:14 PM, Jerry Stuckle wrote:
On 10/9/2014 1:04 PM, rickman wrote:

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...

Another question... when subatomic particles are created in pairs from
energy, where does the mass come from?


I have no idea - which is why I'm asking these questions.

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