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GATE ME 2023 Set 1 — Question 56

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NAT+2 / -0HardComparators & InterferometryMetrology & InspectionMetrology, CIM & Additive Mfg

Metrology, CIM & Additive Mfg → Metrology & Inspection → Comparators & Interferometry

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Question

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 μm0.5\ \mu\text{m}, 12 fringes were observed over a length of 15 mm15\ \text{mm} of gauge B. If the gauges are placed 45 mm45\ \text{mm} apart, the height difference of the gauges is ______________ μm\mu\text{m}.
Diagram showing an optical flat placed on two slip gauges A and B on a flat surface, with dimensions 45 mm between gauges and 15 mm width for gauge B.
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