Q3: To obtain magnification = -3, where should we keep the object? Name the mirror and draw it's ray diagram.
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Explanation:
The magnification is -1 means the image is real and inverted and is of the same size as that of the object. so if the image is at a distance of 40cm from the mirror then the object is also at a distance of 40cm from the mirror (because the object is placed at Cie center of curvature of the mirror.
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