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Q6 A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens is the prescribed lensdiverging or converging? |
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Answer» Power of lens= 1/focal length ⇒ focal length = 1/power of lens =1/1.5 =0.6667 m Since the focal length is positive, the prescribed lens is convex and is converging lens. |
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