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Q.

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

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a

90°

b

180°

c

d

equal to angle of incidence

answer is A.

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Detailed Solution

When the angle of refraction is equal to 90°, the angle of incidence is called the critical angle.
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In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?