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24-01-2024
Physics

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How many lines per millimeter are required in a grating if the first-order diftion line at 450 nm is to be observed at a reflection angle of 10 deg when the angle of incidence is 60 deg?
a) 1000 lines per millimeter
b) 500 lines per millimeter
c) 750 lines per millimeter
d) 250 lines per millimeter

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