Comment by gosub100

I agree that photons cannot be distinguished, but how do you reconcile the following:

- photons travel at the speed of light in a vacuum

- it takes 90k years (or whatever) for a photon to travel from the sun's core to your retina?

Ok, the core of the sun is not a vacuum, quite the opposite, but the path is fraught with being continuously absorbed and emitted. It's not one photon travelling at a few km/hr is it?

And I don't think photons are reflected in hydrogen, although I have no proof. I just thought reflection was done with things like flat surfaces or mirrors.

This is why I said "not the same photon", but I admit I have only YouTube-spectator level knowledge