Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected, and (b) refracted light ? Refractive index of water is 1.33.

Explanation

(a) Reflected light: (wavelength, frequency, speed same as incident light)
`lambda=589nm, v=5.09xx10^(14)Hz. C=3.00xx10^(8)ms^(-1)`
(b) Refracted light: (frequency same as the incident frequency)
`v=5.09xx10^(14)Hz`
`v=(c//n)=2.26xx10^(8)ms^(-1), lambda=(u//v)=444nm`