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Find the power of a lens when focallength is 20 cm.You are provided two lensof focal length 20 cm and you.Which lenswill you use to obtain more convergentlight (use P-1/8) |
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Answer» Given that f= 20cm =0.2m Power of convergence is given by p =1/f So, p= 1/0.2 = 5D Since p1=p2. So both lenses have same convergence of refracted light. |
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