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Where should an object be kept on the pr...

Where should an object be kept on the principal axis of a convex lens of focal length 20 cm, in order to get an image, which is double the size of the object?

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To solve the problem of where an object should be placed on the principal axis of a convex lens with a focal length of 20 cm to obtain an image that is double the size of the object, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Given Information**: - Focal length (f) of the convex lens = +20 cm (positive because it is a convex lens). - Magnification (m) required = 2 (for a virtual image) or -2 (for a real image). ...
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