QuestionDetails: Please, can anyone answer in details? A converging lens produci

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QuestionDetails: Please, can anyone answer in details? A converging lens producing a 3-times enlarged real image ofan object located at 15 cm from the lens. Find the focal length ofthe lens and distance to the image QuestionDetails: Please, can anyone answer in details? A converging lens producing a 3-times enlarged real image ofan object located at 15 cm from the lens. Find the focal length ofthe lens and distance to the image QuestionDetails: Please, can anyone answer in details? A converging lens producing a 3-times enlarged real image ofan object located at 15 cm from the lens. Find the focal length ofthe lens and distance to the image

Explanation / Answer

Given :              Magnification (M) = 3              Object distance (u) = 15 cm We know that :                    Magcification (M) = - v / u                             or   - v / u    = 3                              or     v         = - 3 * u                                                   = - 3 * 15 cm                                                   = - 45 cm Hence Image distance (v)    = -45 cm           We have :                     1 / f    =   1 / u + 1 /v                               = 1 / 15 - 1 / 45                  Focal length is :                              f = 22.50   cm Hope this helps u!                             

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