A concave lens has focal length of 20 cm. At what distance from the lens should a 5 cm tall object be placed so that it forms an image at 15 cm from the lens ? Also calculate the size of the image formed. Draw the ray diagram to justify
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At what distance from the lens should a 5 cm tall object be ... be placed so that it forms an image at 15 cm from the lens ? Also calculate the size of the image formed.
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