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Doctor suggest a lens of power -0.5D to a person, Calculate focal length of lens, name the types of lens. |
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Answer» Answer: it is a concave LENS, because power, radius of CURVATURE , and focal length of concave lens MEASURED in negative form. Explanation: we know that, Power = 1/f(in METERS) -0.5 = 1/f f = -1/0.5 f = -2 m |
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