. A student focused the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle screen and lens as under Position of candle = 12.0 cm Position of convex lens= 50.0 cm Position of the screen = 80.0cm a) What is the focal length of the convex lens?
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When candle is shifted towards the lens from this position, its distance from the lens is f<u<2f. In this scenario, image formed is virtual, diminished and erect.
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