Physics · 2018
JEE Main · 15 April 2018, Shift 2 · Q22
A convergent doublet of separated lenses, corrected for spherical aberration, has resultant focal length of 10 cm. The separation between the two…
A convergent doublet of separated lenses, corrected for spherical aberration, has resultant focal length of $\displaystyle 10$ cm. The separation between the two lenses is $\displaystyle 2$ cm. The focal lengths of the component lenses are :
Official answer
(4)
$\displaystyle 18$ cm, $\displaystyle 20$ cm
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.