What happens when the light hits the glass depends on what it was in before it hit the glass.
WHILE it's in the glass, the speed of light doesn't change.
Relative time
seems to fit with this type of question.
Hope i Helped!
According to Coulomb’s Law, the force will quadruple.
However…
Let’s assume, for the sake of argument, that both proton and electron behave entirely like particles.
The trajectory of the electron will stretch, and its distance from the nucleus will oscilate until is estabilizes again at the original value.
