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 x 10 -2 m towards the slits, the change in fringe width is 3 x 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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(600)
=600nm
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