Is this the eV for electrons to move higher in shells in glass.

Jan 2016
Is this description for silicon in glass how much eV the electron needs to leave the ground state, and move to shell 2. Energy gap 1.12 eV?
and also, Energy separation (EΓL) 4.2 eV
Maybe its not the same silicone that goes into glass.
solid state physics can be VERY DIFFERENT than atomic physics. When atoms are joined together to form a solid, their behavior can be very different than when they are isolated. There are no more "discrete energy states" at the low-lying range, because these have been replaced by energy BANDS! Look at carbon, for example. If I take carbon atoms, and arrange it in one way, I get graphite.
But I change the arrangement in another way, I get diamond! Two completely different types of material, and with different optical properties.
Yet, each one of them is made of carbon!


Apr 2008
Bedford, England
I think the answer is yes.
The electron energy bands corresponding to visible light will (in general) be associated with the electrons that are also involved with atomic bonding.
Different forms of atomic bonding will alter the energy bands of the electrons that form the bonds.