Question

At what distance from a concave mirror of focal length 25 cm should be kept so that the size of image is equal to the size of object​

Answer 1

Answer:

For getting image of equal size,,. the object must be kept at the (R) of the Convex Lens

so, distance of object will be = R. {R = 2f}

so, distance to keep object = 2*25 = 50cm

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