Question

In order to determine the focal length of a concave mirror by obtaining the image of distant object
on screen, the position of screen should be :

(a) parallel to plane of concave mirror
(b) perpendicular to plane of concave mirror
(c) inclined at an angle 60° to plane of mirror
(d) in any direction with respect to the plane of concave mirror

Answer 1

Answer:

B) perpendicular to plane of concave mirror

Explanation