Question

define critical angle ​

Answer 1

Explanation:

critical angle

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

Answer 2

Answer:

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

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