When a light ray moves from air to a transparent medium the angle of incidence and the angle of refraction are 45∘ and 30∘ respectively. Find the refractive index of this medium is
A
1.21
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B
1.42
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C
1.88
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D
2.42
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Solution
The correct option is B1.42 Given,
Angle of incidence ∠i=450
Angle of refraction ∠r=300
By Snell's law
n=sinisinr, where n is the refractive index of the medium.