A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

BISMARCK, N.D. (KFYR) - To create atmospheric optics we need two things: ice crystals in the air and a light source. All ...

Unlike a sound waves, light waves do not need a medium ... of light as it travels from one material to another is called refraction. The diagram shows refraction of light passing into, and then ...