Why does light penetrate glass

But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids.For that, we need to go all the way down to the subatomic level.You may know that an atom consists of a nucleus with electrons orbiting around it,but you may be surprised to know that it's mostly empty space.In fact, if an atom were the size of a sports stadium,the nucleus would be like a single pea in the center,while the electrons would be like grains of sand in the outer seats.That should leave plenty of space for light to pass through without hitting any of these particles.