Fringe separation = Wavelength x Distance/Slit Separation
Fringe separation = 475nm x 2.2m/0.4mm
Fringe separation = 5.4375mm
Angle between the middle of the fringe and the middle of the second bright fringe = Fringe separation/Distance
Angle between the middle of the fringe and the middle of the second bright fringe = 5.4375mm/2.2m
Angle between the middle of the fringe and the middle of the second bright fringe = 0.2475 radians
A double slit interference experiment is set up in a laboratory using a source of blue monochromatic light of wavelength 475nm.the separation of the two slit is 0.40mm and the distance from the slit to the screen where the fringe are observed is 2.20m. calculate the fringe separation, and the angle between the middle of the fringe and the middle of the second bright fringe
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1 answer