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Monochromatic light of wavelength 589 nm...

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

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In case of refraction only the frequency is fixed .
`:. f = 5.09 xx 10^(14) ` Hz
v`=(c)/(mu)=(3xx10^(8))/(1.33) =2.26 xx 10 ^(8) "m" . s^(-1)`
`:. lambda= (v)/(f) =(2.26 xx 10^(8))/(5.09 xx 10 ^(14))=444 `nm
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