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The wavelength of light coming from a sodium source is 589 nm. What will be its wavelength in the water?(a) 625 nm(b) 443 nm(c) 789 nm(d) 125 nmI got this question in homework.My question is taken from Wave Optics in section Wave Optics of Physics – Class 12

Answer»

The correct choice is (B) 443 NM

The EXPLANATION: λ = 589 nm, μ = 1.33.

Wavelength in water, λW = \(\frac {\lambda }{\mu }\)

λW = \(\frac {589}{1.33}\)

λW = 443 nm.



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