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A convex lens of power 5 D and a concave lens of power 7.5 D are placed in contact each other. What is the power and focal length of this combination of lenses. |
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Answer» tion:total POWER= P1+P2 5D+ 7.5D= 12.5D1/total focal LENGTH= 1/F1+1/F2however,1/F = PTherefore1/total focal length= 5+7.5= 12.5total focal length= 1/12.5 m0.08m8cm hope my ANSWER has HELPED youplease mark my answer as brainliest.. |
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