Velocity of light in air is `3 xx 10^8 m//s` and in glass its velocity is `2 xx 10^(8) m//s` so for glass angle of polarisation is ......

Options

A. `56.50^(@)`
B. `56.30^(@)`
C. `56.1^(@)`
D. `56^(@)`

Answer

B

Explanation

Refractive index of glass `mu= tan theta_(p)`
but `mu=(c)/(v)=(3xx10^(8))/(2xx10^(8))=1.5`
`:.theta_(p)=tan^(-1)(1.5)`
`:.theta_(p)=56.30^(@)`