Q. The angel of prism is $5{^\circ}$ and its refractive indices for red and violet colours are 1.5 and 1.6 respectively. The angular dispersion produced by the prism is
A) $7.75{^\circ}$
B) $5{^\circ}$
C) $0.5{^\circ}$
D) 0.17${^\circ}$
Explanation
(c) $\theta = \left( \mu_{v} - \mu_{R} \right)R = (1.6 - 1.5) \times 5 = 0.5{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.