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GATE Mechanical Engineering (ME) 2023 Shift 1 Solved Paper

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Question : 56

Total: 65

An optical flat is used to measure the height difference between a reference slip gauge A and a slip gauge B. Upon viewing via the optical flat using a monochromatic light of wavelength 0.5 µm, 12 fringes were observed over a length of 15 mm of gauge B. If the gauges are placed 45 mm apart, the height difference of the gauges is ______________ μm.
(Answer in integer)

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