Light containing two wavelengths 1 and 22 falls normally on

Last updated: 6/10/2023

Light containing two wavelengths 1 and 22 falls normally on a planoconvex lens of radius of curvature R resting on a glass plate If the nth dark ring due to 21 coincides with the n 1 th dark ring due to 22 prove that the radius of nth dark ring of 21 is 1 R 1 1