Question

State the meaning of linear magnification ?how is it related to object distance and image distance ?when is magnification positive and negative? please answer it very fast!!! please

Answer 1

Ratio of size of image to size of object

m=-v/u

'm' is negative when image is real and inverted

It is positive when image is virtual and erect

Please mark it as brainliest

Answer 2

Explanation:

The linear magnification produced by a spherical lens (convex or concave) is defined as the ratio of the height of the image (h′) to the height of the object (h). It is a pure ratio and has no units. It is denoted by the letter ‘m’ and is given by,

or  

The linear magnification (m) is also related to the object distance (u) and image distance (v).

It can be expressed as:  

⇒ Linear magnification, .

This shows that linear magnification produced by a lens is also equal to the ratio of the image distance (v) to the object distance (u).