Question

Critical angle is that angle of incidence in denser medium for which angle of refraction in rare
medium is:
(a) 45°
(b)
(c)
(d)
90°
0°
180°​

Answer 1

Answer:

b) 90°

Explanation:

Critical angle is that angle of incidence for which the angle of refraction is ninety degree. And the light ray must travel from optically denser to optically rarer medium.

Answer 2

Answer:

the answer is (b)90

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