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Mariulka [41]
3 years ago
7

Suppose a ray of light traveling in a material with an index of refraction na reaches an interface with a material having an ind

ex of refraction nb. Which of the following statements must be true for total internal reflection to occur?Check all that apply.a. The angle of incidence must be less than the critical angle.b. na = nbc. na > nbd. The angle of incidence must be greater than the critical angle.e. The angle of incidence must be equal to the critical angle.
Physics
1 answer:
ivolga24 [154]3 years ago
5 0

Answer: Option (b) is the correct answer.

Explanation:

It is known that when a ray of light tends to travel from a denser to rarer medium then there occurs total internal reflection.

For a denser medium the refractive index is greater than that of a rarer medium. This means that for the given situation refractive index of medium n_{a} is greater than medium n_{b}.

this also means that incident angle must be greater than the critical angle of the medium.

Thus, we can conclude that the statement n_{a} > n_{b} must be true for total internal reflection to occur.

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