A beam of monochromatic blue light of wavelength 440nm in air travels in water ( μ= 4/3). What will be its wavelength in water?
Answer & explanation
Correct answer: option 1
λ ∝ 1/μ
λ2/λ1 = μ1/μ2
λ2 = (3/4)x 440 (since μ21 = 4/3 and λ1 = 440nm)
= 330nm