Question

A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as : Position of the candle = 10 cm; Postion of the convex lens= 48 cm; Position of the screen = 86 cm. What is the focal length of the lens?

Answer 1

Answer:

800 is the answer it's is a 800

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