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If thin lens of power5Dand -2D are placed in contact with each other focal length of combination
2 years ago

## Answers : (1)

Arun
23478 Points

Dear Tarun

Let the two lenses be A and B

Power of A =+5D

power of B = -2D

P= p1 +p2

P =5+(- 2)

Power =3.0 D

Regards

Arun (askIITians forum expert)

2 years ago
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