A concave mirror forms a real image 60 cm from the pole for an object 30 cm from the pole. Find the radius of curvature in centimetres.
Physics · Geometrical optics · spherical mirror
JEE Mains NEET

Question

A concave mirror forms a real image 60 cm from the pole for an object 30 cm from the pole. Find the radius of curvature in centimetres.

G1 Physics · Accepted Answer

1/f=1/30+1/60=1/20, hence |f|=20 cm and R=2|f|=40 cm.