Question

what is the angle of critical angle??

Answer 1

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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

Critical angle is angle of incidence of a ray of light, moving from denser medium to rarer medium, such that the angle of refraction becomes 90°.

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