an object is placed at a distance of 15 cm from a concave mirror. images formed at a distance of 10cm in front of the mirror .what is the focal length of the mirror and it 's answer is6 cm .give me answer it is urgent
an object is placed at a distance of 15 cm from a concave mirror. images formed at a distance of 10cm in front of the mirror .what is the focal length of the mirror and it 's answer is6 cm .give me answer it is urgent
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