[gary]

Originally Posted by bojan

Laws of thermodynamics:
Information means lowering entropy, to lower entropy you need energy.. therefore to send information you need energy...
Photon carries energy, so it can be used for exchange of information, just like any other particle.

Photon rest mass is zero, but because it moves (with light speed, and it is light speed because the rest mass is zero) it carries certain amount of energy, depending on it's frequency (or wavelength)

There you go. Wonderful.