Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass ? [The speed of light in vacuum is `3xx10^(8)ms^(-1)`].

Explanation

Refractive index of glass with respect to air
`= mu_(ga)=1.50`
Speed of light in vacuum `(c ) = 3xx10^(8)ms^(-1)`.
Speed of light in glass = ?
`mu_("glass")=("speed of light in air / vaccum")/("speed of light in glass")=(c )/(v_("glass"))`
`1.5=(3xx10^(8))/(v_("glass")) , v_("glass")=2xx10^(8)ms^(-1)`