Q.

A beam of light is converging towards a point I on a screen. A plane parallel plate of glass whose thickness in the direction of beam = t, refractive index= μ, is introduced in the path of the beam. The convergence point is shifted by :

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a

t1+1μaway

b

t11μnearer

c

t11μaway

d

t1+1μnearer

answer is A.

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Detailed Solution

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Shift s=t11μ and shift takes place in direction of ray.

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