A man 180 cm tall stands 4.5 m in front of a larger vertical plane mirror. Then the angle subtended at the eye by his image In the plane mirror is

Options

A. `0.2^@`
B. `0.4^@`
C. `0.2` radian
D. `0.4` radian

Answer

A

Explanation

In `A A^(')B^(')`,
`tantheta=(1.8)/(9.0)=(1)/(5)=0.2`
As `theta` is small
`tantheta=theta=0.2rad`