cse • paper_1 • waves_oscillationscse-2026-subject-02-001
Diffraction — UPSC CSE 2026 Physics PYQ
Buy PYQ Solution Manual →Light of wavelength 6000\text{ \AA} is incident on a slit of width 0\cdot 40\text{ mm}. The screen is placed 2\text{ m} away from the slit. Find (i) the position of the first dark fringe and (ii) the width of the central bright fringe.
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