Question

what is a critical angle? how much degree is it of?​

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:

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Answer 2

Answer:

critical angle is when mom picks her hand up at 110° and gives a tight slap

therefore, critical angle us 110°

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