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MHT CET Physics question

PhysicsWave OpticsMHT CET

A beam of light consisting of two wavelengths and is used to illuminate the slit of a Young's double slit experiment. Then, the order of the bright fringe of the longer wavelength that coincide with a bright fringe of the shorter wavelength at the least distance from the central maximum is

Answer: (D)

Solution

Coincidence needs , i.e. , whose smallest integer solution is ,

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Question ID VK-077319