an object of 5.0 cm in size is placed at a distance of 20.0 cm from a concave mirror of focal length 15 cm. at what distance from the mirror should a screen be placed to get sharp image? calculate the size of image
an object of 5.0 cm in size is placed at a distance of 20.0 cm from a concave mirror of focal length 15 cm. at what distance from the mirror should a screen be placed to get sharp image? calculate the size of image
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