Question

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to $\frac{3}{4}$ of the angle of the prism. The angle of deviation is

• A. $20^{\circ }$
• B. $30^{\circ }$
• C. $45^{\circ }$
• D. $39^{\circ }$

Answer 1

Answer: (B)

$i_1+i_2-A=D$