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CBSE Class 10 Answered

if f1 and f2 are the focal length of two lens,what is the relation for equivalent focal length ?
Asked by priyanka mohan | 17 Dec, 2011, 06:09: PM
answered-by-expert Expert Answer
formula for finding equivalent focal length(F):
1/f1  +1/f2  =1/F
Answered by | 19 Dec, 2011, 10:45: AM
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