For total internal refraction: a. the index of refraction of the material on the

Question

For total internal refraction:

a. the index of refraction of the material on the incident side of the boundary must be the same as the index of refraction of the material on the other side.
b. the index of refraction of the material on the incident side of the boundary must be lower than the index of refraction of the material on the other side.
c. the index of refraction of the material on the incident side of the boundary must be greater than the index of refraction of the material on the other side.
d. whether or not total internal reflection occurs is not dependent upon the relation of the indices of refraction

Explanation / Answer

The correct answer is option C. Because in case of total internal reflection the incident ray must be from denser medium to the rarer medium. The refractive index of the denser medium is greater than the refractive index of the rarer medium.

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