Q) two thin lenses (focal lengths f1 and f2 ) are in contact . their equivalent focal length?

Q) two thin lenses (focal lengths f1 and f2 ) are in contact . their e

1.	Q) two thin lenses (focal lengths f1 and f2 ) are in contact . their equivalent focal length?
Answer» F=1÷(1/f1+1/f2).....this MAY be the EQUIVALENT FOCAL LENGTH

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Q) two thin lenses (focal lengths f1 and f2 ) are in contact . their equivalent focal length?

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