Coherent light with wavelength 609 passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from…

Coherent light with wavelength 609 passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe.For what wavelength of light will the first-order dark fringe be observed at this same point on the screen?

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