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The diagram below shows two transparent materials–material $G$ and material $P$. The black path is the path of a light ray through the materials.

Which of the following statements is true?

Created for Albert.io. Copyright 2016. All rights reserved.

A

The sine of the angle that the light ray makes with the normal in substance $G$ is greater than the sine of the angle that the light ray makes with the normal in substance $P$.

B

Light travels more slowly in material $P$ than it does in material $G$.

C

Material $G$ must be air or a vacuum.

D

Material $P$ must be air or a vacuum.

E

The index of refraction of substance $P$ is less than the index of refraction of substance $G$.

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