The critical angle of a prism is `30^(@)`. The velocity of light in the medium is

Options

A. `1.5xx10^(8)m//s`
B. `3xx10^(8)m//s`
C. `4.5xx10^(8)m//s`
D. None of these

Explanation

We have, `sintheta_(c)=(1)/(mu)`
`therefore mu=(1)/(sin30^(@))=2` M
The velocity of light, `v=(c)/(mu)=(3.0xx10^(8))/(2)`
`=1.5xx10^(8)m//s`