1.

A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature \[36cm.\]The distance of the object from the mirror is          [MP PET 1986]

A. \[5cm\]
B. \[12cm\]
C. \[10cm\]
D. \[20cm\]
Answer» C. \[10cm\]


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