ifos • paper_1 • waves_oscillations
[UPSC IFoS 2015] Interference (Q195, 10M)
With a planoconvex lens of radius of curvature R resting on a plane glass surface, Newton's rings are observed with incident light of wavelength \lambda. Find the radii of m\text{th} order dark rings. What will be the colour of the innermost ring with white light illumination?
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