Regular reflection occurs when a beam of light falls on a ……………
(a) smooth surface
(b) polished surface
(c) rough surface
(d) Both (a) and (b)

(d) Both (a) and (b)

Reason — Regular reflection occurs when a beam of light falls on a smooth and polished surface, such as a plane mirror. The reflected beam is also parallel and it is in a fixed direction. It can be seen only from a particular direction.