PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364700
The angle of deviation suffered by a ray incident on a plane mirror, at an angle of incidence \(30^\circ \) is
1 \(120^\circ \)
2 \(180^\circ \)
3 \(90^\circ \)
4 None of these
Explanation:
\(\delta = \pi - 2i = {180^ \circ } - 2 \times 30 = {120^ \circ }\) clockwise
