Reflection And Refraction
When light passes through a non-opaque object refraction causes the light to bounce off in a different direction; this also causes the light spectrum to become visible at certain angles.
Two terms are used; Angle I and Angle R. Angle R indicates the angle which the light goes into the object and angle I indicates the angle which the light comes out of the object
- I > r going into the block
- R > I going out of the block