The velocity effect of the fount over the photon

The photon seen by an observer on the absolute space as a reference point

c = velocity of the photon emission;
V = universe’s expansion velocity at fount A;
c₂ = photon velocity seen by the observer, where c₂ = c + V;
a = direction angle of the photon emission;
b = direction angle acquired by the photon, due to the velocity V;
A₁ = fount A position when the photon was emitted;
A = fount A position when photon is on position F;
A₁F= real photon trajectory. It is just seen by the observer on the absolute space.

An observer on the absolute space sees a light fount A in the universe with its expansion velocity V. To this observer, one photon emitted by a fount has two velocities:

– The universe’s expansion velocity V.
– The velocity of photon c emission.

Then, to the observer viewpoint, the photon has the velocity c₂, wherec₂= c + V.

The photon seen by an observer on the fount A as a reference point

However, an observer on the fount A as a reference point, that does not know its universe’s expansion velocity V, does not know about the influence of this velocity on the photon velocity. Then, to this observer viewpoint, the photon will continue with the velocity c and with the same modulus and direction.