Question

Name the following 1) The angle of incidence for which the angle of refraction becomes 90°​

Answer 1

Answer:

Critical angle

Explanation:

The critical angle is defined as the angle of incidence that provides an angle of refraction of 90-degrees.

When the angle of incidence in water reaches a certain critical value, the refracted ray lies along the boundary, having an angle of refraction of 90-degrees. This angle of incidence is known as the critical angle; it is the largest angle of incidence for which refraction can still occur.

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Answer 2

Answer:

The critical angle

This angle is defined as the angle of incidence that provides an angle of refraction of 90-degrees