JEE PHYSICS MCQ: WAVE OPTICS

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A two-slit Young's interference experiment is done with monochromatic light of wavelength

6000{\mkern 1mu} \;\mathop {\text{A}}\limits^ \circ

. Those slits are

2 \,{~mm}

apart. The fingers are observed on a screen placed

10\, {~cm}

away from the slits. A transparent plate of thickness of

0.5 \,{~mm}

is placed in front of one of the slits. It is found that the interference pattern shifts by

5 \,{~mm}

. What is the refractive index of the transparent plate?

View answer and explanation

Correct option: A

1.2

Option A (1.2) is correct because it is the refractive index of the transparent plate calculated using the shift in the interference pattern formula.

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