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i. Doctor has prescribed a lens havingpower +1.5 D. What will be the focallength of the lens? What is the typeof the lens and what must be thedefect of vision?

Answer»

power of lens is given by power p aap equal to one upon app f is equal to 1 upon p B equal to f equal to one upon -1.5 f is equal to minus 6 point 6 centimetre since the power is negative the lens is of a diverging nature dot therefore it's a concave lens



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