physics

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A ray of light of vacuum wavelength 550 nm
traveling in air enters a slab of transparent
material. The incoming ray makes an angle of
37.4◦
with the normal, and the refracted ray
makes an angle of 22.0◦
with the normal.
Find the index of refraction of the transparent material. (Assume that the index of
refraction of air for light of wavelength 550
nm is 1.00.)

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