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

Explanation

We are given : `lamda=589"nm"=589xx10^(-9)`
For reflected light, wavelength is unchanged, `lamda=589"nm",c=3xx10^(8)"m/s"`.
We are to calculate, frequency (`upsilon`)
Using relation: `upsilon=c/(lamda)=(3xx10^(8))/(589xx10^(-9))=5.09xx10^(14)"Hz"`