Which of the following can make a parallel beam of light when light from a point source is incident on it ? [1]
A. concave mirror as well as convex lens
B. convex mirror as well as concave lens
C. two plane mirrors placed at 90° to each other
D. concave mirror as well as concave lens
Answer:A
Which of the following can make a parallel beam of light when light from a point source is incident on it ? [1]
A. concave mirror as well as convex lens B. convex mirror as well as concave lens C. two plane mirrors placed at 90° to each other D. concave mirror as well as concave lens