cse • paper_1 • waves_oscillations
[UPSC CSE 1997] Diffraction (Q286, 20M)
A plane transmission grating has 6000 lines per cm. Determine the angular separation between the two lines of sodium of wavelengths 5896\text{ \AA} and 5890\text{ \AA} in the second order spectrum. If the width of the grating is 2.5\text{ cm}, will these lines be resolved?
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