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Part A: Substance 1 has an index of refraction equal to 1.22; substance 2 has an...

Part A:

Substance 1 has an index of refraction equal to 1.22; substance 2 has an index of refraction equal to 1.45.

Is the speed of light in substance 1 greater than, less than, or equal to the speed of light in substance 2?

Part B:

A beam of light travels from air into a transparent material. The angle of incidence is 27 ∘ and the angle of refraction is 17 ∘.

What is the index of refraction of the material?

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