a converging lens is kept coaxially in contact with a diverging lens, both the lenses being of equal focal lengths. what is the focal length of the combination?

Asked by SHELLY | 2nd Oct, 2012, 01:11: AM

Expert Answer:

Let the focal length of both the lenses be f.
Focal length of the combinationis F given by
1/F = (1/f)+(1/-f) = 0
or, F is infinity.

Answered by  | 3rd Oct, 2012, 04:08: PM

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