A convex mirror gives an image area equal to one-fourth the object area. If the object is 30 cm away, the image distance magnitude is:
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A convex mirror gives an image area equal to one-fourth the object area. If the object is 30 cm away, the image distance magnitude is:

G1 Physics · Accepted Answer

Area ratio=1/4 gives linear magnification +1/2. Thus |v|=|u|/2=15 cm.