Question

If the angle of incidence is equal to the critical angle then the angle of refraction is
Options ..... A) 0 degree B) 20degree C)90degree D)180degree

Answer 1

option (c) 90degrees is correct answer ..
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Answer 2

Answer:

Explanation:

If angle of incidence is less than critical angle, refraction takes place.

If angle of incidence is equal to critical angle, angle of refraction is equal to 90degrees.

If angle of incidence is greater than critical angle, total internal reflection takes place.

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