Some Simple Optics

Refraction
Refraction occurs when light travels from one medium crosses a boundary and enters another medium of different properties. For example, light traveling from air to water. The amount of refraction (or bending) can be calculated using Snell's Law.

n_iSini = n_rSinr

Reflection
Reflection occurs when the light hits the surface and bounces back at a certain angle. These angles can also be calculated with one important fact.

angle of incidence = angle of reflection

Page developed by Leo S.K. Cheng