To determine the focal length of a convex lens by obtaining a sharp image of a distant object, the following steps were suggested which are not in proper sequence.I. Hold the lens between the object and the screen.II. Adjust the position of the lens to form a sharp image.III. Select a suitable distant object.IV. Measure the distance between the lens and the screen.The correct sequence of steps to determine the focal length of the lens is

1. III, I, II, IV
2. III, I, IV, II
3. III, IV, II, I
4. I, II, III, IV

(a) III, I, II, IV         

Explanation 

The correct sequence of steps to determine the focal length of the lens is-

1. Select a suitable distant object.

2. Hold the lens between the object and the screen.

3. Adjust the position of the lens to form a sharp image.

4. Measure the distance between the lens and the screen.

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Updated on: 10-Oct-2022

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