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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)`A. ` 1.5`B. `1.33`C. `1.25`D. `1.8` |
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Answer» Correct Answer - B `V_L=v lambda= 5 xx 10^(14) xx 450 xx 10^(-9)` `= 225 xx 10^(6) = 2.25 xx 10^(8) m//s ` `:. n=(C)/(V_L)=(3 xx 10^(8))/(2.25 xx 10^(8))=(4)/(3)` |
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