A boy stands straight infront of a mirror at a distance of 30cm away from it. He sees his erect image whose height is 15th of his real height. The mirror he is using is
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a
Plane mirror
b
Convex mirror
c
Concave mirror
d
Plano-convex mirror
answer is B.
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Detailed Solution
Size is 15. It can’t be plane and concave mirror, because both conditions are not satisfied in plane or concave mirror. Convex mirror can meet all the requirements