**Chapter-9|Ray Optics and Optical Instrument|NCERT 12th Physics:**

**Linear Magnification Produced by a Lens(m):**

Linear magnification of a lens is defined as the ratio of the height of the image formed by the lens and height of the object.

Here we will use hᵢ and h₀ with sign. Height above principal axis is positive and below negative.

**Proof of m= v/u :-**

4. |m|<1, means. hᵢ<h₀

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