When a light wave goes from air into water,th | vedclass

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(C) When light travels from one medium to another,its speed and wavelength change due to the change in the refractive index of the medium. However,the

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Frequency

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(C) When light travels from one medium to another,its speed and wavelength change due to the change in the refractive index of the medium. However,the frequency of light depends only on the source of the light and remains constant regardless of the medium it travels through. Mathematically,if $
u$ is the frequency,$v$ is the speed,and $\lambda$ is the wavelength,then $v = 
u \lambda$. In a medium with refractive index $\mu$,the new speed $v' = v/\mu$ and the new wavelength $\lambda' = \lambda/\mu$. Thus,the new frequency $
u' = v'/\lambda' = (v/\mu) / (\lambda/\mu) = v/\lambda = 
u$. Therefore,the frequency remains unchanged.

When a light wave goes from air into water,the quality that remains unchanged is its

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