Q.

A point object placed off the principal axis is moving parallel to principal axis of a concave mirror of focal length f. Distance of object from principal axis is h. Choose INCORRECT statement/s about the image:

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a

Image moves along a straight line passing through centre of curvature C

b

Image moves along a straight line passing through focus F

c

Image moves along a straight line parallel to principal axis

d

Image moves along a straight line inclined at angle  tan1(hf)  from principal axis

answer is A, B.

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Detailed Solution

Image have component of velocity in the direct parallel and perpendicular to principal axis both.

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A point object placed off the principal axis is moving parallel to principal axis of a concave mirror of focal length f. Distance of object from principal axis is h. Choose INCORRECT statement/s about the image: