A light ray of frequency 'v' and wavelength ' | vedclass

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(A) When a light ray travels from one medium to another,its frequency '$v$' remains unchanged because it depends only on the source of the light.The s

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frequency $v$ and wavelength $\left(\frac{2}{3}\right) \lambda$

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(A) When a light ray travels from one medium to another,its frequency '$v$' remains unchanged because it depends only on the source of the light.The speed of light in a medium is given by $v = \frac{c}{n}$,where '$c$' is the speed of light in vacuum and '$n$' is the refractive index.The wavelength in the medium is given by $\lambda' = \frac{v}{f} = \frac{c/n}{f} = \frac{\lambda}{n}$.Given the refractive index $n = \frac{3}{2}$,the new wavelength is $\lambda' = \frac{\lambda}{3/2} = \left(\frac{2}{3}\right) \lambda$.Therefore,the frequency remains '$v$' and the wavelength becomes $\left(\frac{2}{3}\right) \lambda$.

$A$ light ray of frequency '$v$' and wavelength '$\lambda$' enters a liquid of refractive index $\frac{3}{2}$. The ray travels in the liquid with:

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