Imagine the three windows to the right belong to a room . predict what will happen if you stand on the other side of each window and shine a flashlight to the inside.

In the first Windows, the light wont go through well, but will still go through, in the second window, the light will go trough it normally and the third light wont be able to pass

1st will go through because of the black lines 2nd won't because light is already passing through 3rd it will pass through because the window is all black. hopefully that helped:)