A ray of light is incident on a plane mirror at an angle of `60^(@)`. The angle of deviation produced by the mirror is

Options

A. `120^(@)`
B. `30^(@)`
C. `60^(@)`
D. `90^(@)`

Answer

C

Explanation

Here angle of incidence `i=60^(@)`
Angle of deviation `delta=180^(@)-(i+r)`
`=180^(@)-2i ` (As i=r)
`=180^(@)-2xx60^(@)=60^(@)`