A real object is 24 cm from a concave mirror and its real image is 48 cm from the mirror. Find |f| in centimetres.
Physics · Geometrical optics · spherical mirror
JEE Mains NEET

Question

A real object is 24 cm from a concave mirror and its real image is 48 cm from the mirror. Find |f| in centimetres.

G1 Physics · Accepted Answer

1/|f|=1/24+1/48=3/48=1/16, hence |f|=16 cm.