Possible Experiment to To Test if Light Slows Down in Glass Due To Difussion.

As a follow up to light slowing down in a glass I propose a possible experiment.   This again has probably already been done however it's an experiment.

According to the theory I proposed atoms are closer together than any wavelength of visible light.   If I'm wrong we could test this with visible light.  If not then using another form of em radiation shine light through a material who's distance between atoms is greater than the wavelength of the radiation being shined through it.   That material should then be unable to slow down the light that is shined through it.   Some of the light will be blocked since the higher the wavelength the the more easily it is absorbed.  High frequency radiation would easily.    Radio waves being so low in frequency are not absorbed by most substances since their energy isn't enough to move electrons.   I guess they are absorbed by metals who's electrons are extremely free.   If the radiation though is high enough in frequency it will pass through substances simply because it fits between the atoms.   Although it would have to be at the correct angle and the substance would have to be crystalline.   It's like rows in an orchard.   You can see through an orchard if you view it from just the right angle.   Sow you would have to hit it with light at just the right angle and the light would pass through it without slowing down.  Unlike glass which slows down the "average speed" of light in this case the radiation would not be slowed down but shine right through.  You would think though that cosmic rays would get through the atmosphere since in the atmosphere the atoms must be very far apart (much further apart than any radiation).

There is another theory that I'm thinking about and it's about photons.   How many photons are in radiation.    Suppose an electron moves to a lower orbital.   It gives off a photon.   Is there a particular direction to that photon or does it radiate in all directions?   Perhaps it radiates in all directions until it bumps into an electron who it can move to another orbital.   If it bumps into one that has already been moved to a new orbital it continues radiating in all directions.  The thing is that the photon isn't a thing all it is is the energy that moved the electron.   It never really had a particular location because it was a wave.  It's simply a sphere of influence.     Why then would that sphere of influence be influenced itself by unwilling electrons that it can't influence?   A wave is energy spreading out.   The actual things are the electrons.  Electrons don't just absorb light they are clearly also able to reflect and deflect it.   So the light that isn't absorbed gets reflected or deflected inside the material as well as on it's surface.   Light passing through glass is being deflected off of those orbitals.   It's a wave front of a single photon spreading out and bending around orbitals that continues on until it finds an electron it can influence.

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