An object placed at a distance of 9cm from the first principal focus o – InterviewSolution

1.	An object placed at a distance of 9cm from the first principal focus of a convex lens, produces a real image at a distance of 25cm from its second principal focus away from the lens. Then the focal length of the lens is:
Answer» An object placed at a distance of 9cm from the first principal focus of a convex lens, produces a real image at a distance of 25cm from its second principal focus away from the lens. Then the focal length of the lens is:

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