Question

A pin of length 9 CM has been placed in front of a convex mirror of focal length 20cm. the distance of the object from the pole is 10 centimetre .find the size of image in centimetre, give proper explanation​

Answer 1

Mirror formula : 1/f = 1/v - 1/u u= -9 cm, f= -20cm (sign conventions) Solving , we get v= +20cm The + sign indicates that the image is formed on the right ... The focal length of a concave mirror is 20 cm.