Light takes `t_(1)` second to travel a distance x cm in vacuum and the same light takes `t_(2)` second to travel 10x cm in medium. The critical angle for the corresponding medium is

Options

A. `sin^(-1)((10t_(1))/t_(2))`
B. `sin^(-1)(t_(2)/(10t_(1)))`
C. `sin^(-1)((10t_(2))/t_(1))`
D. `sin^(-1)(t_(1)/(10t_(2)))`

Answer

A

Explanation

`mu_(med)/mu_(air)=C_(air)/C_(med)=(d/t)_(air)/(d/t)_(air)`