For a small angled prism, angle of prism `A` of minimum deviation`(delta)` varies with the refractive index of the prism as shown in the graph

Options

A. Point P corresponds to n = 1
B. Slope of the line PQ = A/2
C. Slope = A
D. None of the above statements is true

Answer

A, C

Explanation

`delta = A (n - 1)`
at `delta = 0 , A (n - 1) = 0 rArr n = 1.`