The refractive indices of two media, are denoted by `n_(1)` and
`n_(2)` and the velocities of light in these two media are
respectively `v_(1) and v_(2). If n_(2)//n_(1)` is 1.5, which one of the following statements is correct?

Options

A. a `v_(1)` is 1.5 times `v_(2)`
B. b`v_(2)` is 1.5 times `v-(1)`
C. c `v_(1)` is equal to `v_(2)`.
D. d `v_(1)` is 3 times `v_(2)`.

Answer

A

Explanation

Refractive index of medium 2 w. r. t. medium 1 is given
by
`n_(2)=` Speed of light in medium1/ Speed of light in medium 2
`= v_(1) //v_(2) =1.5`
hence, `v_(1)= 1.5 xx v_(2)`