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If a combination of 3 convex lens is arranged in the shown manner the focal length of lens I is + 10 cm, lens II is 20 cm and lens III is 40 cm. Calculate the total power of the combination of lens? |
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Answer» If a combination of 3 convex lens is arranged in the shown manner the focal length of lens I is + 10 cm, lens II is 20 cm and lens III is 40 cm. Calculate the total power of the combination of lens? |
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