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one half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lensproduce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagramto support your answer. A 4cm tall object is placed perpendicular to the principal axis of a convex lens offocal length 20 cm . the distance of the object from the lens is 15 cm. find the nature, position and sizeof the image.

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