2. A 542.0-nm light source illuminates two slits with a separation of 6.00 ✕ 10−4 m, forming an interference pattern on

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2. A 542.0-nm light source illuminates two slits with a
separation of 6.00 ✕ 10−4 m, forming an interference pattern on a
screen placed 3.70 m away from the slits. At a point a distance of
3.80 mm from the central maximum, what are the following? (a) the
phase difference between the two waves originating at the slits
(Give your answer to at least three significant figures.)
_______rad
(b) the intensity compared to that of the central maximum
_______Imax