cse • paper_1 • waves_oscillations
[UPSC CSE 1997] Interference (Q217, 20M)
Why does a soap film appear coloured when is viewed by reflected white light? A thin film is illuminated by sodium light of wavelength 5900\text{\AA}. Its refractive index is 1.42. Calculate its minimum thickness so that it appears dark in reflected light.
Discussion (0)
Sign in to post a solution, derivation, or discussion.
No comments yet. Start the conversation!