An object is present on the principal axis of a concave mirror at a distance `30cm`from it.Focal length of mirror is`20cm` If object starts moving with `2cms^(-1)`perpendicular to principal axis above the principal axis then,A. image moves with velocity`4cms^(-1)`below the principal axis.B. image moves with velocity`4cms^(-1)`above the principal axis.C. image moves with velocity`8cms^(-1)`below the principal axis.D. image moves with velocity`8cms^(-1)`above the principal axis.

An object is present on the principal axis of a concave mirror at a di

1.	An object is present on the principal axis of a concave mirror at a distance `30cm`from it.Focal length of mirror is`20cm` If object starts moving with `2cms^(-1)`perpendicular to principal axis above the principal axis then,A. image moves with velocity`4cms^(-1)`below the principal axis.B. image moves with velocity`4cms^(-1)`above the principal axis.C. image moves with velocity`8cms^(-1)`below the principal axis.D. image moves with velocity`8cms^(-1)`above the principal axis.
Answer» Correct Answer - A

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