Question

A transparent solid cylindrical rod has a refractive index of . It is surrounded by air. A light ray is incident at the mid-point of one end of the rod as shown in the figure. The incident angle for which the light ray grazes along the wall of the rod is - 

40564
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A

B

C

D

.

Hard
JEE Mains
Solution
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Correct option is D)



So,
Now,

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