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A ray of light traveling through air strikes a boundary with a second substance, and travels at $37^\circ$ (relative to the normal) upon entering the new substance.

If the light was moving at $53^\circ$ (relative to the normal) prior to striking the boundary, what is the index of refraction of the second substance?

A

$0.75$

B

$1.3$

C

$1.5$

D

$1.7$

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