Q. In an equilateral prism if incident angle is $45{^\circ}$ then minimum deviation is
A) $30{^\circ}$
B) $60{^\circ}$
C) $45{^\circ}$
D) $90{^\circ}$
Explanation
(a) Here, $i = 45{^\circ},\ A = 60{^\circ}$
Angle of minimum deviation
$\delta_{m} = 2i - A = 2 \times 45{^\circ} - 60{^\circ} = 30{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.