Physics · 2008
NEET 2008 · Prelims · Code A · Q23
Two thin lenses of focal lengths f_1 and f_2 are in contact and coaxial. The power of the combination is:
Two thin lenses of focal lengths $\displaystyle f_1$ and $\displaystyle f_2$ are in contact and coaxial. The power of the combination is :
Official answer
(1)
$\displaystyle \frac{f_1+f_2}{f_1 f_2}$
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NEET (UG) 2008 Physics question, with the answer from NTA’s final answer key. Where our answers come from.