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A ray of laser light (dotted line) is shining through a plastic equilateral prism surrounded by air with an index of refraction of $1.52$.

Created for Albert.io. Copyright 2017. All rights reserved.

Which of the following angles of incidence at the plastic-air interface would result in total internal reflection?

A

$60^\circ$

B

$41.1^\circ$

C

$30.0^\circ$

D

$25.6^\circ$

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