The figure shows an object O and its image I formed by a mirror at B. If AB is the principal axis of the mirror, the mirror is
A
plane
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B
concave
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C
convex
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D
either concave or convex
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Solution
The correct option is B concave The image is formed in front of the mirror which is real and inverted. This is only possible in a concave mirror. Thus, the mirror is concave.