A double convex lens forms a real image of an objectt on a screen which is fixed. Now lens is given a constant velocity v=1m/s along its axis and away from the screen for the purpose of forming image always on the screen the object is also required to be given appropriate velocity . Find the velocity (in m/s) of the object at the instant its size is doubled the size of the image.

A double convex lens forms a real image of an objectt on a screen whic

1.	A double convex lens forms a real image of an objectt on a screen which is fixed. Now lens is given a constant velocity v=1m/s along its axis and away from the screen for the purpose of forming image always on the screen the object is also required to be given appropriate velocity . Find the velocity (in m/s) of the object at the instant its size is doubled the size of the image.
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