Question: Coherent light with wavelength 400nm passes through two very narrow slits that are separated by 0.200 mm and the interference pattern is observed on a

Coherent light with wavelength 400nm passes through two very narrow slits that are separated by 0.200 mm and the interference pattern is observed on a screen 4.00 m from the slits.
(a) What is the width (in mm) of the central interference maximum?
(b) What is the width of the first-order bright fringe?

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