^Prism
^Prism
Prism angle A is also called refracting angle & not angle of refraction.
A light ray DE in incident on the first face AB of a prism ABC at an incidence angle i1. The refracted ray EF bends towards the base BC of the prism has a refraction angle r1 & strikes the second face AC of the prism at an incident angle i2. If i2 < C, then the light ray striking the face AC undergoes refraction & emerges out from the prism as the emergent ray FG.
