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 If f1 and f2 are focal length of two …

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 If f1 and f2 are focal length of two lens,what is the relation for equivalent focal length?

    • Posted by Ranveer Raj 7 years, 2 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Naveen Sharma 7 years, 2 months ago

    Ans.

    \( Equivalent \space Focal\space Length \space(F) = {f_1. \space f_2 \over (f_1+f_2 -d)}, \)

    Where d is small distance b/w two lenses.

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