sci.physics.electromag

Androcles and alt.sci.physics:

Androcles wrote:
[...]
> The very small spread of a photon is why distant galaxies appear red,
> not because they are flying away from us.
>


What is the cause of the spread of a photon?

Has that been observed and measured?

Does the spread relate to the energy reduction of the photon?

What cites can you point to that give the reader further information on
the topic?


Ralph Hertle