Question

The angle of incidence for which the angle of refraction is X is called the critical angle. Then X equals ______.

विकल्प

• 90°

• 60°

• 45°

• 30°

Answer 1

The angle of incidence for which the angle of refraction is X is called the critical angle. Then X equals 90°.

Explanation:

By definition, the critical angle is the angle of incidence in the denser medium for which the corresponding angle of refraction in the rarer medium is 90°.