Physics, 04.04.2020 02:23, xxsyd21

Light illuminating a pair of slits contains two wavelengths, 500 nm and an unknown wavelength. The 10th bright fringe of the unknown wavelength overlaps the 9th bright fringe of the 500 nm light. what is the unknown wavelength?

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Light illuminating a pair of slits contains two wavelengths, 500 nm and an unknown wavelength. The 1...