Light of wavelength 650 nm passes through two narrow slits 0.66 mm apart. The screen is 2.40
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Light of wavelength 650 nm passes through two narrow slits 0.66 mm apart. The screen is 2.40 m away. A second source of unknown wavelength produces its second-order fringe 1.23 mm closer to the central maximum than the 650-nm light. What is the wavelength of the unknown light?
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