A graph sheet divided into squares each of size \mm 2 is kept at a distance of 7cm from a magnifying glass of focal length of 8cm. The graph sheet is viewed through the magnifying lens keeping the eye close to the lens. Find (i) the magnification produced by the lens, (ii) the '(irea of each square in the image formed (iii) the magnifying power of the magnifying lens. Why is the magnification found in (i) different from the magnifying power?

Explanation

To solve the problem step by step, we will break it down into three parts as per the question.

### Given Data:
- Focal length of the magnifying glass, \( f = 8 \, \text{cm} \)
- Distance of the object (graph sheet), \( u = -7 \, \text{cm} \) (negative because the object is on the same side as the incoming light)

### Step 1: Find the image distance \( v \) using the lens formula.
The lens formula is given by:
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