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For each of the rays A and B in medium 1 and medium 2, which ray will undergo total internal reflection if the incident angle is increased gradually provided, the index of refraction is greater in medium 1 than medium 2?

For each of the rays A and B in medium 1 and medium 2, which ray will undergo total internal reflection if the incident angle is increased gradually provided, the index of refraction is greater in medium 1 than medium 2? Correct Answer Ray A

The rays in the denser medium will have total internal reflection.

Thus, Ray A will undergo TIR since it is in the denser medium.

Note: Rays in the denser medium will undergo the TIR than in the rarer medium.

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