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    Diffraction grating

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    A diffraction grating produces a first-order bright fringe that is 0.0934 m away from the central bright fringe on a flat screen. The separation between the slits of the grating is 4.27 10-6 m, and the distance between the grating and the screen is 0.625 m. What is the wavelength of the light shining on the grating?

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