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(a) A screen is kept at a distance of 1m...

(a) A screen is kept at a distance of 1m from the object. A converging lens between the object and the screen, when placed at any of the two positions which are 60cm apart, forms a sharp image of the object on the screen. Find the focal length of the lens.
(b) In the two positions of the lens, lateral size of the image is 4cm and 9cm. Find the size of the object.

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AI Generated Solution

To solve the problem step by step, we will break it down into two parts as given in the question. ### Part (a): Finding the Focal Length of the Lens 1. **Understanding the Setup**: - The object is placed at a distance of 1 m (100 cm) from the screen. - The lens can be placed in two positions which are 60 cm apart. ...
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