Calculate the speed of light in a medium whose critical angle is `30^(@)`.

Options

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

Answer

A

Explanation

(a) We have,sin`theta_(c)=1/µ`
`therefore` `µ=1/(sin30^(@))=2`
The velocity of light, v=`c/µ=(3.0xx10^(8))/(2)`
=`1.5xx10^(8)m//s`