At what distance should an object be placed from a lens of focal length 25cm to obtain its image on screen placed on the other side at a distance of 50cm from the lens?what will be the magnification produced??
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since the f=+25cn it is a converging lens
So v=50cm is the image is obtained on 2f-2.
This implies that the object should be placed on 2f-1 is 50 cm to obtain the image at the distance of 50cm on the other side of the lens.
m=v/u=50/-50=-1
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