Red light of wavelength `750 nm` enters a glass plate of refractive index `1.5`. If velocity of light in vacuum is `3 xx 10^(8) m//s`, calculate velocity, wavelength and frequency of light in glass.

Answer

`2 xx 10^(8) m//s ; 500 nm ; 4 xx 10^(14)Hz`

Explanation

Here, `lambda = 750 nm, mu = 1.5, c = 3 xx 10^(8)m//s`
`v = (c )/(mu) = (3 xx 10^(8))/(1.5) = 2 xx 10^(8)m//s`
`lambda' = (lambda)/(mu) = (750)/(1.5) = 500 nm`
`v' = v = ( c)/(lambda) = (3 xx 10^(8))/(750 xx 10^(-9)) = 4 xx 10^(14) Hz`