Two narrow, parallel slits separated by .250 mm areilluminated by green light (=

Question

Two narrow, parallel slits separated by .250 mm areilluminated by green light (= 546.1nm). Theinterference pattern is observed on a screen 1.20 m away from theplane of the slits. Calculate the: a.) from the central maxium to the first bright region oneither side of the central maxium b.) between the first and second dark bands. Two narrow, parallel slits separated by .250 mm areilluminated by green light (= 546.1nm). Theinterference pattern is observed on a screen 1.20 m away from theplane of the slits. Calculate the: a.) from the central maxium to the first bright region oneither side of the central maxium b.) between the first and second dark bands.

Explanation / Answer

distance between two narrow slits = d = 250mm =250*10-3m wave length of light = = 546.1nm =546.1*10-9m distance between screen and slit= L = 1.20m if = dsin= (m+1/2) if m = 0 gives fist dark band and if m=2 gives seconeddark band . difference gives part b answer. for part a) from the part b if m = 0 it gives first darkfringe                        sin= /2d plug values we will get sin -=---- then from the central maxium to first bright regionis gives ybright = Lsin= plug values it will gives y = ------

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