JEE PHYSICS MCQ: WAVE OPTICS

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In a two slits experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the slits. If the screen is moved by

5 \times {10^{ - 2}}\;m

towards the slits, the change in fringe width is

3 \times {10^{ - 5}}\;m

. If separation between the slits is

{10^{ - 3}}\;m

, the wavelength of light used is

View answer and explanation

Correct option: D

6000\mathop \mathrm{A}\limits^ \circ

Option D (

6000\mathop \mathrm{A}\limits^ \circ

) is correct because the wavelength is calculated using the change in fringe width and the change in distance between the screen and the slits in Young's double-slit experiment.

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