Question

What is magnification?

Answer 1

Magnification is defined as the ratio of the size of the image (h) to the size of the object (h').
Magnification formula: 
m = h/h' = -v/u

Answer 2

HEY MATE HERE IS YOUR ANSWER:-

It is the ratio of the size of image to the size of object.

HOPE IT HELPS ☺️