question_answer

Given a point source of light, which of the following can produce a parallel beam of light               [CPMT 1974; KCET 2005]

A)            Convex mirror

B)            Concave mirror

C)            Concave lens

D)            Two plane mirrors inclined at an angle of \[90{}^\circ \]

Correct Answer: B

Solution :

                   Object should be placed on focus of concave mirror.