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two thin lens of power+6D and -2D are in contact . what is the focal length of the combination?

two thin lens of power+6D and -2D are in contact . what is the focal length of the combination?

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1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
9 years ago
lens equation,

1/f= 1/6 -1/2

sher mohammad
b.tech, iit delhi

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