1.

When an object is kept at a distance of 30cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of `9cm s^(-1)` the speed with which the image moves isA. 10 cm/sB. 1 m/sC. 9 m/sD. 0.9 m/s

Answer» Correct Answer - B
`V_(I)=-m^(2)V_(0)`
`=-((10)/(30))^(2)xx9=1m//s" "]`


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