I believe you're referring to the 'realism vs locality' debate still being discussed among the Quantum science community?
https://youtu.be/zcqZHYo7ONs?t=40
The propagation velocity of a photon is determined by the impedance of the medium it travels through. This is determined by the electric permitivity and magnetic permeability of that region of space.
(The same rule applies to EM waves ).
TinMan, thanks for the link. It's so interesting that in QM, light and EM waves are considered the same thing.
Ah,but are the guru's right ?
Dose QM have it nailed?.
Lets think about this--
Lets take a plain old mirror.
Now,with that mirror we can redirect/reflect sunlight at almost 100% efficiency.
this means that the photons of light will hit the mirror and bounce off in a direction determined by the angle of the mirror to that of the source(in this case,the sun).
But what of electromagnetic waves?
I am not aware of any mirror being able to redirect/reflect electromagnetic waves,as the electromagnetic wave would simply pass straight through the mirror.
It would seem to me that the EM wave's and the photon are two different entities.
If electromagnetic waves were reflected of a mirror,then we should get a merging of the waves heading toward the mirror,and the waves being reflected of the mirror at a different angle. This would be seen as a blurring effect in the mirrors reflection. But we do not see this in the reflection,we see a perfectly clear reflection,were no wave mixing has taken place. If we place two identical mirrors opposite each other,facing each other,and then place a small object in between those mirrors,we see an infinite amount of reflections in each mirror of that object,where each reflection gets smaller and smaller-->but we never see any blurring or mixing of electromagnetic waves-->we see an infinite amount of perfect reflections.
Have you ever wondered as to why each reflection in each mirror seems to get smaller and smaller ?.
Dose this show us photons traveling between each mirror in opposite directions?
Are the photons trapped between the two mirrors,just continually bouncing from one mirror to the other?.
Do we our selves emit photon's?,if not,how do we see our self in the mirror.
Do photons bounce of us,hit the mirror,then reflect those very photons back to our eyes ?
I still think there is much yet unknown when it comes to light.
Brad
Never let your schooling get in the way of your education.