Light traveling in a medium of index of refraction n1 is incident on another medium having an index of refraction n2. Under which of the following conditions can total internal reflection occur at the interface of the two media?

Question

Accepted Answer

The indices of refraction have the relation n1> n2.

Answer

The angle of incidence is less than the critical angle.

Answer

The angle of incidence must equal the angle of refraction.

Answer

Light travels slower in the second medium than in the first.

Answer

The indices of refraction have the relation n2 > n1.

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