Main Question or Discussion Point
What is the distance between two photons in a ray of light?
ok, when light travels in a ray of light, isn't there some distance between them, otherwise I guess it wouldn't be quanta. Or when a laser is beamed towards the moon for measurement, the light disparses, so distance would increase. In an experiment done with a single photon counting CCD camera, the distance between the photons was 2km (http://ophelia.princeton.edu/~page/single_photon.html"). Is it wave related?Photons are bosons, which means that you can have as many photons in the same state as you want. This means that an arbitrary number of photons can be in the exact same place, moving in the exact same direction with the same polarization.
In a laser, we try stack as many photons on top of each other in as small a space as we can. The density of photons that we get depends mostly on the technical limitations of the laser.
I wasn't suggesting they would bump into each other. I just wanted to have an idea what the distance, definite positions, between these single waves are in a normal ray of light or a laser beam. Thus when light "travels", and before the distances get bigger when they disperse.* a laser disperses because a single photon is a wave... it also has a definite position
Again, as LukeD said they are bosons so not only can there be 0 distance between them they can also be in otherwise completely identical states of polarization momentum etc.isn't there some distance between them, otherwise I guess it wouldn't be quanta