Question

What is magnification of a lens ? What is
indicated by magnification less than one and
negative?​

Answer 1

$\huge \bold \green{ur \: answer}$

A magnification of 1 (plus or minus) means that the image is the same size as the object. If m has a magnitude greater than 1 the image is larger than the object, and an m with a magnitude less than 1 means the image is smaller than the object.