Magnification (or Linear magnification)
Linear Magnification produced by a mirror is defined as the ratio of the size (or height) of the image to the size (or height) of the object. It is denoted by m. If h’ is the size (or height) of the image produced by the mirror and h is the size (or height) of the object.
Then, Linear magnification is:
Magnification = Height of Image / Height of Object
or
m = h‘ / h
where
- m is the magnification of the spherical mirror,
- h’ is the Height of Image, and
- h is the Height of Object.
Linear magnification has no unit.
Sign Convention for Spherical Mirrors
Sign Convention for Spherical Mirrors: While studying the reflection of light by spherical mirrors and the formation of images by spherical mirrors, a set of sign conventions are needed to learn that is required to measure the focal length, the distance of the object or image from the mirror, and the magnification of the mirror.
Before, understanding the concept of sign conventions for spherical mirrors first discuss some commonly used terms in a spherical mirror.
Table of Content
- Commonly Used Terms in Spherical Mirrors
- Sign Convention for Spherical Mirrors
- Important Points to Remember
- Mirror Formula
- Magnification (or Linear magnification)
- Solved Examples on Sign Conventions for Spherical Mirrors