This one will be trivial to most. Puzzling to some.
So, I have this special glass. See the illustration above. Disregard the colors. I put those in for interest. Color doesn’t have anything to do with the Quiz Question.
Light enters the pane of glass from the right. Only half of it emerges from the other side. Due to the index of refraction of the glass and the surrounding medium being the same, there is no surface reflection. Half of the light entering the pane is absorbed, and only half comes out the other side.
If I double the thickness of the pane, how much light comes out the other side? Post your answer in the comments section below.