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A ray of light of frequency 5 xx 10^(14)...

A ray of light of frequency `5 xx 10^(14)` Hz is passed through a liquid . The wavelength of light measured inside the liquid is found to be 450 nm . Calculate (i) wavelength of light in vacuum (ii) refractive index of liquid (iii) velocity of light in the liquid . Take velocity of light in vacuum as ` 3 xx 10^(8) ms^(-1)`

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