An object of 4 cm height is placed at a distance 10 cm from a convex lens of focal length 20 cm. find the position, nature, and size of the imagel
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Answer. f = 20 cm. h' = 4X2 = 8cm. Therefore, the image is real and inverted.
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Object distance, u = -10 cm (It is to the left of the lens.) Focal length, f = + 20 cm (It is a convex lens.) Thus, the image is formed at a distance of 20 cm from the convex lens (on its left side). ... Thus, the height or size of the image is 8 cm.
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