JEE PHYSICS MCQ: WAVE OPTICS

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The central fringe of the interference pattern produced by light of wavelength

6000 \mathop {\text{A}}\limits^{\text{o}}

is found to shift to the position of 4th bright fringe after a glass plate of refractive index 1.5 is introduced in front of one of slits in Young's experiment. The thickness of the glass plate will be

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Correct option: A

4.8 \mu \mathrm{m}

Option A (

4.8 \mu \mathrm{m}

) is correct because the shift in the central fringe is related to the thickness and refractive index of the glass plate.

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