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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 :Given that POWER of the prescribed lens P = + 1.5 D and `P = (1)/(f)` `THEREFORE` Focal length of the lens `f = (1)/(P) = (1)/(+1.5 D) = + 0.67` m As the power of the lens is +ve, the lens is a converging (convex) lens. |
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