Photon, Momentum, Mass

[Jeckyl]

Only the physical processes taking
place in the source could influence the speed at which the light is
emitted.

Yes .. it is emitted at the speed of light c .. nothing more, nothing less

Once it is emitted

... then that the source moves away has no bearing on its speed. As far as
the source is concerned it continues to move at the speed of light, c.
Indeed, as far as an frame of reference is concerned, it moves at the speed
of light, c.

[Pmb]

According to Maxwell a 'field' is a stress in the aether.

Maxwell was wrong.

That stress or disturbance can propagate at c.

Go for broke and try to find a model for an ether which
accomplishes that.

Without an aether what is a 'field'?

What is field with an ether? Try and explain how the ether interacts
with itself to propagate a disturbance and you are right back to having
to invent another ether to explaion that, and again and again, ad
infinitum.

You've taken John's comments totally out of context. Why do you think
Einstein postulated the speed of light to be constant? He certainly
wasn't thinking "geometry" as that idea came much later. As far as
ether interacting with itself to propagate a disturbance, the simple
analogy is a sound wave.

No, it is not.

I disagree. It was this analogy that theorist created the ether for in the
first place. Please explain why you disagree with the OP

There's no need to invent more air. Your
circularity argument makes no sense.

Get a new hobby. Physics is out of your reach in only 1 lifetime.

Off topic comment. Please minimize this kinds of comments.

Pete