A screen is placed 2 m away from a single narrow slit which is illuminated by the light of wavelength `6xx10^(-7)`m. If the first minimum lies 4 mm on
A screen is placed 2 m away from a single narrow slit which is illuminated by the light of wavelength `6xx10^(-7)`m. If the first minimum lies 4 mm on either side of the central maximum, find the width of the slit.
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