Question

(u) concave mil1407 2- A sharp. image of a distant object is obtained on a screen you using a convenx lens. In order to focal length of the lens, you need to distance between the : i lens and the object in lens and the screen (iii) object and the screen (iv) both (B) & (c) ​

Answer 1

Explanation:

When the object is at infinity, its image is formed at the focus of the lens. For determination of the focal length of the lens, the distance between the lens and the screen should be measured because all the rays converges at a common point on the screen.

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Answer 2

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