Coherent light with wavelength 602 nm passes through two very narrow slits, and

Question

Coherent light with wavelength 602 nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 m from the slits. The first-order bright fringe is a distance of 4.84 mm from the center of the central bright fringe. For what wavelength of light will the first-order dark fringe (the first dark fringe next to a central maximum) be observed at this same point on the screen? Express your answer in micrometers (not in nanometers). Coherent light with wavelength 602 nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 m from the slits. The first-order bright fringe is a distance of 4.84 mm from the center of the central bright fringe. For what wavelength of light will the first-order dark fringe (the first dark fringe next to a central maximum) be observed at this same point on the screen? Express your answer in micrometers (not in nanometers). For what wavelength of light will the first-order dark fringe (the first dark fringe next to a central maximum) be observed at this same point on the screen? Express your answer in micrometers (not in nanometers).

Explanation / Answer

fringe width =lambda*D/d

since fringe width now is twice so lambda wlii be twice

lambda=602*2=1204 nm=1.204 micro meter

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