cse • paper_1 • waves_oscillationscse-2015-subject-02-002
Thin-lens optics — UPSC CSE 2015 Physics PYQ
Buy PYQ Solution Manual →A convex lens of focal length 20\,\mathrm{cm} is placed after a slit of width 0.5\,\mathrm{mm}. If a plane wave of wavelength 5000\,\mathring{\mathrm{A}} falls normally on the slit, calculate the separation between the second minima on either side of the central maximum.
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