If the refractive index of glass is 1.5. Find the velocity of light in glass. (Velocity of light in vacuum `= 3 xx 10^(8) m//s`)

Options

A. `1.5 xx 10^8 ms^(-1)`
B. `2 xx 10^8 ms^(-1)`
C. `3 xx 10^8 ms^(-1)`
D. `4.5 xx 10^8 ms^(-1)`

Answer

B

Explanation

`mu = (c )/(v ) `
` therefore v= (c )/(mu )`
`= (3 xx 10^8 )/( 1.5 ) = 2xx 10^8 ms^(-1)`