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Monochromatic light of wavelength 589 nm...

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

Text Solution

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We are given : `lamda=589"nm"=589xx10^(-9)`
Moving from one medium to other, frequency remains unchanged.
`therefore` frequency of refracted light `upsilon.=5.09xx10^(14)"Hz"`
Also `lamda.=589/(n)=589/(1.33)=433"nm"=433xx10^(-9)m`
`v=c/(n)=(3xx10^(8))/(1.33)=2.26xx10^(8)"m/s"`.
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