Question

A convex lens of focal length 10 cm forms a real and inverted image,when an object is kept at a distance of 15 cm from it. What is the position of the
image ?​

Answer 1

Answer:

f = +10 cm, v = +20 cm as image is real and inverted. Height of the object = 2 cm. (say+ve) Object is placed at 2F, image is also formed at 2F on the side of the lens. So image will be of the same size as the object as |u| = |v| and, therefore, the height of the image will be 2 cm.

Explanation:

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Answer 2

Explanation:

At what distance from the lens should the object be placed so that forms a real and inverted image 20 cm away from the lens? Ans: 20 cm,24