Question

How is the angle of emergence related to the angle of incidence when prism is in the position of minimum deviation? Illustrate your answer with help of a labelled diagram using an equilateral prism? 

Answer 1

In case of an equilateral prism, when the prism is in the position of minimum deviation δ = δ min, the angle of incidence i1 is equal to the angle of emergence i2.
𝔦1 = 𝔦2 = 𝔦