The refractive index of fused quartz is 1·46 and that of sapphire is 1·77. If v_q is the speed of light in quartz and v_s is the speed of light in sapphire, then which one of the following relations is correct ?

NDA 2020 Physics question

The refractive index of fused quartz is 1·46 and that of sapphire is 1·77. If is the speed of light in quartz and is the speed of light in sapphire, then which one of the following relations is correct ?

(A)Correct
(B)
(C)
(D)

Answer: (A)

Solution

The speed of light in a medium is , so it is greater in the medium of lower

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Question ID VK-031690