For an equilateral prism having refractive index 3, what is the angle of incidence of a ray of light, so that the ray is parallel to the base inside the prism?
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a
30o
b
45o
c
60o
d
90o
answer is C.
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Detailed Solution
Angle of refraction r=90o-60o=30o∴sini=μsinr=3sin30o=32 ⇒i=60o