Q. The deviation caused in red, yellow and violet colours for crown glass prism are $2.84{^\circ},\ 3.28{^\circ}$ and $3.72{^\circ}$ respectively. The dispersive power of prism material is
A) 0.268
B) 0.368
C) 0.468
D) 0.568
Explanation
(a) $\omega = \frac{\delta_{V} - \delta_{R}}{\delta_{Y}} = \frac{3.72 - 2.84}{3.28} = 0.268$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.