Question

Draw a labelled graph of angle of deviation (𝛿) versus angle of incidence (i) for a prism.

Answer 1

As angle of incidence increases, angle of deviation first decreases and then increases.

Same value of 𝛿 (shown as 𝛿') for two values of angle of incidence at the first face.

𝛿_m is the angle of minimum deviation for a particular value (i) of angle of incidence.