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Two slits in YDSE are placed 2 millimete...

Two slits in YDSE are placed 2 millimeter from each other. Interference pattern is observed on a screen placed 2m from the plane of slits. What is the fringe width for a light of wavelength 400 nm, what will be the angular fringe width ?

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Angular fringe width will be `(beta)/D=(0.4m)/(2m)=2xx10^(-4) ` radian.
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