A 6 cm axial rod has its nearer end 24 cm and farther end 30 cm from a concave mirror of focal length 18 cm. Find the exact image length magnitude in centimetres.
Physics · Geometrical optics · spherical mirror
JEE Mains NEET

Question

A 6 cm axial rod has its nearer end 24 cm and farther end 30 cm from a concave mirror of focal length 18 cm. Find the exact image length magnitude in centimetres.

G1 Physics · Accepted Answer

v(24)=18×24/6=72 cm; v(30)=18×30/12=45 cm. Image length=27 cm.