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Three lenses having powers 2 D,2.5 D and 1.7 D are kept touching in a row. What is the total power of the lens combination ? |
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Answer» <P> To find: Power of COMBINATION (P) Formula: `P=P_(1)+P_(2)+P_(3)` CALCULATION: From formula, `P=2+2.5+1.7=6.2 D` |
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