JEE PHYSICS MCQ: WAVE OPTICS

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In a Young's double slit experiment in front of one of the slits a thin transparent sheet of thickness

t

and refractive index

\mu

is inserted. The entire fringe pattern will be shifted by a distance (

d

- separation between slits;

D

- distance of screen from the slits and

\lambda

- wavelength of light used)

View answer and explanation

Correct option: C

\frac{(\mu-1) t D}{d}

Option C (

\frac{(\mu-1) t D}{d}

) is correct because the fringe shift is proportional to the path difference introduced by the sheet, the distance to the screen, and inversely proportional to the slit separation.

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