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A point object on the principal axis at ...

A point object on the principal axis at a distance 1.5 cm in front of concave mirror of radius of curvature 20 cm has velocity 2mm/s is perpendicular to the principal axis. The velocity of image at that instant will be

A

2mm/s

B

4 mm/s

C

8 mm/s

D

16 mm/s

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The correct Answer is:
B
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