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Three convex lenses are available having...

Three convex lenses are available having focal lengths of 10 cm, 40 cm and 60 cm respectively. Which one would you choose as a magnifying glass and why?

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To determine which of the three convex lenses would be the best choice for a magnifying glass, we can follow these steps: ### Step 1: Understand the concept of magnifying glass A magnifying glass is essentially a convex lens that allows us to see objects larger than they appear to the naked eye. The effectiveness of a magnifying glass is related to the power of the lens, which is determined by its focal length. ### Step 2: Recall the formula for power of a lens The power (P) of a lens is given by the formula: \[ P = \frac{1}{f} \] ...
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