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Anyone. in class 9(cbse) whose annual exams question. paper is coming from cbse board.if ur exams are completed then, plzz send the pic of all subjects question. papers |
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Answer» Answer: It is the capacity or the ABILITY of a lens to deviate (converge or diverge) the path of rays PASSING through it. A lens PRODUCING more converging or more diverging, is said to have more power. The power of a lens is related to its focal length, F by the EQUATION: The unit for power is dioptre (D). |
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