Question

Which of the following materials has greatest dispersive power

• A. Prism of material P deviates red ray by 10${}^{\circ }$ and violet ray by 16${}^{\circ }$
• B. Prism of material Q deviates red ray by 7${}^{\circ }$ and violet ray by 13${}^{\circ }$
• C. Prism of material R deviates red ray by 3${}^{\circ }$ and violet ray by 8${}^{\circ }$
• D. Prism of material S deviates red ray by 10${}^{\circ }$ and violet ray by 15${}^{\circ }$

Answer 1

Answer: (C)

Correct answer is (c) Prism of material R deviates red ray by 3${}^{\circ }$ and violet ray by 8${}^{\circ }$