cse • paper_1 • waves_oscillationscse-2021-subject-02-003
Thin-film interference — UPSC CSE 2021 Physics PYQ
Buy PYQ Solution Manual →A thin film of petrol of thickness 9 \times 10^{-6}\,\mathrm{cm} is viewed at an angle 30^\circ to the normal. Find the wavelength(s) of light in visible spectrum which can be viewed in the reflected light. The refractive index of the film \mu = 1.35.
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