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A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging? |
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Answer» SOLUTION :`P=+1.5D` `F=?` `f=1/P=1/1.5=10/5=0.667m` `f=66.67cm` SINCE f is positive, LENS is convex (converging lens). |
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