In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen is moved by 5 × 10⁻² m towards the slits, the change in fringe width is 3 × 10⁻³ cm. If the distance between the slits is 1 mm, then the wavelength of the light will be _ _ _ _ _ _ nm.

Optics: JEE Main 2022 Physics question

JEE Main 2022 · 29 Jun, Evening shift · Q77

JEE Main 202229 Jun, Evening shiftPhysicsHardOptics190× since 2002

In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen is moved by 5

\times

10^

-

2 m towards the slits, the change in fringe width is 3

\times

10^

-

3 cm. If the distance between the slits is 1 mm, then the wavelength of the light will be ____________ nm.

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