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Problem: A light ray is incident on an flat interface between two media. The first medium has index n1 = 1.8 and the second medium has an unknown index. The incident angle of the ray is 22° from the normal and the refracted ray is 18° from the normal. What is n2, the index of refraction of the second medium? A) 0.82 B) 1.2 C) 1.5 D) 1.8 E) 2.2 

FREE Expert Solution

We use Snell's law to get the index of refraction of the second medium. 

Snell's law:

η1sin i=η2sin r

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Problem Details

A light ray is incident on an flat interface between two media. The first medium has index n1 = 1.8 and the second medium has an unknown index. The incident angle of the ray is 22° from the normal and the refracted ray is 18° from the normal. What is n2, the index of refraction of the second medium? 

A) 0.82 

B) 1.2 

C) 1.5 

D) 1.8 

E) 2.2 

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