A light ray of 5895 `overset(@)(A)` wavelength travelling in vacuum enters a medium of refractive index 1.5. The speed of light in the medium is :

Options

A. `3 times 10^(8)m//s`
B. `2 times 10^(8)m//s`
C. `1.5 times 10^(8)m//s`
D. `6 times 10^(8)m//s`

Answer

B

Explanation

Speed of light is given by
`" "v=c/n=(3 times 10^(8))/(1.5)=2 times 10^(8)m//s`