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two positions of convex lens for which image of the object is formed on the same screen are 40 cm and 80 cm from the object. The focal length of the lens isa. 80/3b. 40/3c.40d.80 |
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Answer» two positions of convex lens for which image of the object is formed on the same screen are 40 cm and 80 cm from the object. The focal length of the lens is a. 80/3 b. 40/3 c.40 d.80 |
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