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In a two-slit experiment with monochroma...

In a two-slit experiment with monochromatic light, fringes are obtained on the screen placed at some distance form the slits. If the screen is moved by `5 xx 10^-2 m` towards the slits, the change in fringe width is `3 xx 10^-5 m`. If the distance between the slits is `10^-3 m`, calculate the wavelength of the light band.

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