HC Verma Chapter 18 Problem 71 – Plane mirror – locate object from image

Given

Virtual image 15 cm behind mirror

Find

Object distance

Formula

Plane mirror: image distance = object distance (both from mirror)

Solution

Object is 15 cm in front of mirror

Answer

Object at 15 cm in front of mirror

Diagram / Concept

Plane mirror creates virtual image equidistant behind mirror

Notes

Image is erect, same size, laterally inverted