A converging beam of rays is incident on adiverging lensHaving passed through the lens the raysintersect at a point 15 cm from the lens on the oppositesideIf the lens is removed the point where the raysmeet will move 5 cm closer to the lensThe focal lengthof the lens is [2011M]

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A converging beam of rays is incident on adiverging lensHaving passed through the lens the raysintersect at a point 15 cm from the lens on the oppositesideIf the lens is removed the point where the raysmeet will move 5 cm closer to the lensThe focal lengthof the lens is [2011M]