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Q.

For an angle of incidence θ on an equilateral prism of refractive index 3  the ray refracted is parallel to the base inside the prism. The value of θ is

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a

300

b

600

c

450

d

900

answer is B.

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Detailed Solution

A=60o μ=3if refracted ray is parallel to base  r1=r2=30osini1=μsinr1solving i1=60o
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