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Magnification by Thin Lenses

What is meant...

Question

What is meant by magnification of a lens? Write its expression.

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Solution

Magnification of a lens: The ratio of length of image $I$ perpendicular to the principle axis, to the length of object $O$ is called the linear magnification.
This is denoted by $m$
Linear magnification $(m) = \frac{L e n g t h o f i m a g e I}{L e n g t h o f o b j e c t O}$

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