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two lens of +2.5 dioptre and 0.5 dioptre are placed in contact. find the power and focal length of lens combination. find focal length of lens combination also? |
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Answer» Here = P1 = 2.5 D , P2 = 0.5 D Power of Combination , P = P1 + P2 = 2.5 + 0.5 = 3.0 D Focal LENGTH of combination , |
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