Dear jesko:

On May 10, 1:43*am, jesko wrote:
....
Photon is supposed to have no REST MASS cause
no one can imagine a PHOTON at rest.

No, we can now that we have been able to slow them to a snail's pace
in a Bose-Einstein condensate.

So before you claim your statement try to be more
precise. The actual theory are not definitive.

The theory expresses explicitly, as a result of other well tested
results, the photon has identically zero rest mass. Essentially, you
can have a non-zero photon rest mass, or conservation of momentum, but
not both.

But I'm sure that empirical results overcome theory!

Results are that a non-zero rest mass cannot be proven, but that its
rest mass is many orders of magnitude less than its energy.

David A. Smith