MHT CET Physics question
A beam of monochromatic blue light of wavelength 4200 Å in air travels in water (). Its wavelength in water will be
Answer: (C)
Solution
λ_w = 4200/(4/3) = 3150 Å; 5600 Å multiplies by μ and the others do not match λ/μ. Hence the correct option is (c).