Question

What is magnification
? How it is related to 'u' and 'v'?

Answer 1

Magnification is the ratio of the image distance to the object distance.

On the other hand, magnification can be defined as the ratio of the image height to the object height.

Answer 2

Magnification is given by, $m=\dfrac{v}{u}$

Explanation:

Magnification of a lens or a mirror shows how magnified the image of an object is. In order to find the magnification, the object distance and the image distance is required. It is given by :

$m=\dfrac{image\ distance}{object\ distance}$

if v is the image distance and u is the object distance.

So, $m=\dfrac{v}{u}$

It can be also defined as the ratio of the height of the image to the height of the object.

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Magnification

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