A plane wavefront of yellow light with wavelength `0.5mum` in air suffers refraction in a medium in which velocity of light is `2xx10^(8)ms^(-1)` them, the wavelength of the light associated with a wavefront in the medium would be

Explanation

For wavelength and speed of light associated with a wavefront, we have `(lamda_(1))/lambda_(2)=v_(1)/v_(2)`
Here, `lamda_(1)=0.5mum, v_(1)=3xx10^(8)ms^(-1)`
`v_(2)=2xx10^(8)ms^(-1)`
`rArr(0.5)/lambda_(2)=(3xx10^(8))/(2xx10^(8)`
:. The wavelength of the light associated with a wavefront in the medium is `lambda_(2)=0.33mum`