Question

A ray is incident on a plane mirror at an angle of incidence i and the angle of deviation of reflected ray is D. Then choose the most appropriate plot of |D| versus |i|.

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

The deviation produced by a plane mirror is
$\delta =180–{21}^{\circ }$
of the form y = c – mx
$\therefore$ it should be a straight line with negative slope and
$m=tan\theta =2$
$\Rightarrow \theta ta{n}^{-1}\left(2\right)$