If two lenses of same focal length but opposite nature are placed together ,how will the lens behave

Asked by mehaksaini | 2nd Jun, 2009, 06:27: PM

Expert Answer:

When the lenses are of same focal lengths and of opposite nature and let

f1 = f; f2 = -f

1 / F = (1 / f1) + (1 / f2)

F = f1 f2 / (f1 + f2)

F = infinity

Thus the combination of lenses will behave as a plane glass plate.

 

 

Answered by  | 3rd Jun, 2009, 10:04: AM

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