Question

An object is placed at a large distance in front of a concave mirror of radius of curvature 40 cm. The image will be formed in front of the mirror at a distance: 

(a) 20 cm
(b) 30 cm
(c) 40 cm
(d) 50 cm

Answer 1

20 cm

An object is placed at a large distance but in front of a concave mirror with a radius of curvature of 40 cm. The image of this object will be formed at the focus that is 20 cm away.