NEET Physics Ray Optics and Optical Instruments Questions Solved

NEET - 2012

A ray of light is incident at an angle of incidence, i, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face.If the refractive index of the prism is μ, the angle of incidence i, is nearly equal to

(a)μA                                    (b)μA2

(c)A/μ                                  (d)A/2μ

r1+r2=Ar2=0r1=A

Refractive index:

μ=sini1sinr1

μ=sin isin A

In case of small angle.

μ=iA

i=μA

Difficulty Level:

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