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What is the refractive index of the plastic?

A beam of light falls from air onto a slab of transparent plastic at an angle of incidence of 45 degrees. The angle of refraction of the refracted ray in the plastic is 30 degrees. The refractive index of the plastic is:
a. 1
b. 2
c. square root 2
d. 1/2

Solution Summary

This solution uses Snell's law to determine the refractive index.