cse • paper_1 • waves_oscillationscse-1999-subject-02-007
Thin-film interference — UPSC CSE 1999 Physics PYQ
Buy PYQ Solution Manual →Why an extended source is necessary to see colours in a soap-film ? Non-reflecting surfaces are made by coating very thin films of a transparent material. Find the maximum thickness of such thin coatings given that \lambda = 5.5 \times 10^{-5}\text{ cm} and \mu = 5/4.
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