Proof That the Velocity of Photons Cannot Be Constant but Should Vary

It has been tried to prove: 1. The photons possess rest mass; 2. Since the electrons possess spin motion, the photons emitted from the orbiting electrons too should possess spin motion and their (photons) velocity should depend upon frequency of their spin motion ( ph w ); 3. The velocity of photons of infrared, visible, ultraviolet and higher frequency regions should also depend upon their ph w . Their velocity cannot be constant. It has also been tried to prove that, when the electrons are accelerated by a large voltage, after attaining relativistic velocity by them as the rate of increase in their velocity starts decreasing, the rate of increase in their frequency of spin motion (w ) starts increasing in order to conserve their spin angular momentum ( s L ), motional energy ( m E ) and motional momentum ( m p ). Because, due to their spin motion, they possess s L , m E [= kinetic energy ( k E ) + spin energy ( s E )], and m p [= linear momentum ( lin p ) + spin momentum ( s p )]. The spin motion of electrons generates tendency of linear motion and hence s p in them in the direction of their s L . Their mass does not start increasing in order to conserve their k E and lin p .