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- Thread starter Rap
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- #1

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- #2

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Yes.

- #3

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Do you know of any references that deal with the inertial/gravitational mass of a photon?

- #4

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Anyway it's not difficult to prove it: the photon gas system has zero total momentum p, in the frame of reference in which the box or the cavity is still, so, from the equation:Do you know of any references that deal with the inertial/gravitational mass of a photon?

E

you deduce that E = mc

Of course it's invariant mass (not "relativistic" mass or other).

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