Given below are two statements: one is labelled as Assertion A and the other as Reason R.

Question

G1 Physics · Accepted Answer

When light travels through different media, its frequency remains unchanged but its wavelength changes because v = νλ and v = c/μ. Therefore, λ = c/(μν) So two waves passing through media of different refractive indices acquire different wavelengths and hence different phase changes over the same thickness. Thus Assertion A is true, Reason R is true, and R correctly explains A. Hence option A follows.