Question

A point object is placed at a distance 20 cm from the focus of a concave mirror of radius of curvature 20 cm. Find the distance (in cm) of the image from the focus

(A) 5 cm. 

(B) 10 cm. 

(C) 15 cm. 

(D) 20 cm

Answer 1

Correct option (A) 5 cm.   

Explanation:

Using newton’s formula