Question

The magnification produced by a plane mirror is:

• A. -1
• B. 0
• C. 1
• D. +1/2

Answer 1

The correct option is C 1

Image formed by a plane mirror is erect and of same size as that of object.

Magnification is given as the ratio of image size to the object size. Image size is used after applying proper sign convention.

So, magnification by a plane mirror is:
$\text{Magnification}=\frac{\text{Image Size}}{\text{Object Size}}$
$\text{Magnification}=\frac{\text{+Object Size}}{\text{Object Size}}=+1$