If c is the velocity of light in free space, then the time taken by light to travel a distance x in a medium refractive index `mu` is

Options

A. `(x)/(2)`
B. `(mux)//(c )`
C. `(x)//(muc)`
D. `(c )//(mux)`

Answer

B

Explanation

Velocity of light in a medium, `v=(c )/(mu)`
We know that the time taken, `t=(x)/(v) Rightarrow t=(x)/(c//u) Rightarrow t=(mux)/(c )`