Critical angle for light going from medium (i) to (ii) is `theta` . The speed of light in medium (i) is v then speed in medium (ii) is

Options

A. `v(1-cos theta)`
B. `v//sintheta`
C. `v//costheta`
D. `v(1-sintheta)`

Answer

2

Explanation

Let the speed of light in medium (ii) be `v^(1)`. If `mu` is refractive index of medium (i), denser w.r.t. medium (ii), rarer,then `mu`=`1/sintheta`=`(v')/v`
`thereforev'=v//sintheta`