Question

What is meant by critical angle?​

Answer 1

Answer:

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.

Explanation:

Answer 2

Answer:

Hiii mate....

Explanation:

critical angle is defined as the angle of the incidence that provides the angle of the refraction of the 90 degrees . Make particular note that Critical Angle is an angle of incidence value . for the water air boundary , the critical angle is 48.6 degrees .

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