Question

24. The distance between the potical centre and point of convergence is called focal length in which of the following cases?
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Answer 1

Answer:

When the distance between the object and the screen is more than 4f, we can obtain the image of the object on the screen for the two positions of the lens. It is called displacement method.In one case, the image is magnified.

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Answer 2

Answer:

option c

Explanation:

is correct

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