What is meant by critical angle? a) the maximum angle of incidence inside a medium where light is totally reflected b) the minimum angle of incidence inside a medium where light is totally polarized c) the one angle at which light bounces off a clear smooth substance according to the law of reflection d) the minimum angle of incidence inside a medium where light is totally reflected.

Option C

Explanation:

The minimum angle of incidence inside a medium where lights are not longer refracted but totally reflected is referred to as critical angle

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