here,
the seperation between the slits , d = 0.2 mm = 2 * 10^-4 m
wavelength , lamda = 546.1 nm = 546.1 * 10^-9 m
screen distance , D = 1.2 m
the distance between the first and second dark fringe in the interference pattern , y = lamda * D/d
y = 546.1 * 10^-9 * 1.2 /(2 * 10^-4) m
y = 327.66 * 10^-5 m = 3.28 * 10^-3 m
y = 3.28 mm
the distance between the first and second dark fringe in the interference pattern is e) 3.28 mm
5. A pair of narrow, parallel slits separated by 0.200 mm are illuminated by green light...
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