A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young’s double slit and gives rise to two overlapping interference patterns on the screen. The central maximum of both lights coincide. Further, it is observed that the third bright fringe of known light coincides with the 4th bright fringe of the unknown light. From this data, the wavelength of the unknown light is
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In a double slit experiment, the slits are separated by a distance d and the screen is at a distance D from the slits. If a maxima is formed just opposite to each slit, then what is the order of the fringe so formed?
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