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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 (a) reflected and

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For reflected wave the length and speed remain same .
`:. lambda =589 xx 10^(-9) "m and" c=3 xx 10^(8) m. s^(-1)`
`:. "Frequency" f = ( c) /(lambda) = (3xx 10^(8)) /(589 xx 10^(-9))==5.09 xx 10^(14)` Hz
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