If the refractive index of a medium is 1.7, the velocity of light in that medium is

Options

A. `1.765 xx 10^(8)` m/s
B. `2.5xx10^(8) m//s `
C. `1.1 xx 10^(8) m//s `
D. `2.2 xx 10^(8) m//s `

Answer

A

Explanation

`V_m=(V_a)/(n)=(3 xx 10^(8))/(1.7)=1.765 xx 10^(8) m//s `