Two parallel plane mirrors are 50 cm apart. An object is 20 cm from the left mirror. Find the distance between the nearest image behind the left mirror and the nearest image behind the right mirror.
Physics · Geometrical optics · law of reflection and plane mirror
JEE Mains NEET

Question

Two parallel plane mirrors are 50 cm apart. An object is 20 cm from the left mirror. Find the distance between the nearest image behind the left mirror and the nearest image behind the right mirror.

G1 Physics · Accepted Answer

Take mirrors at x=0 and x=50, object at x=20. Nearest images are at x=−20 and x=80. Their separation is 100 cm.