A convex lens of focal length 20 cm is placed at a distance of 90 cm f – InterviewSolution

1.	A convex lens of focal length 20 cm is placed at a distance of 90 cm from a screen. How far from the lens should an object be placed so as to form a real image on the screen?
Answer» A convex lens of focal length 20 cm is placed at a distance of 90 cm from a screen. How far from the lens should an object be placed so as to form a real image on the screen?

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