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Physics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 2 · Q3
An equiconvex lens of focal length 15 cm is cut into two equal plano-convex halves. The focal length of each half will be:
An equiconvex lens of focal length $\displaystyle 15$ cm is cut into two equal plano-convex halves. The focal length of each half will be :
Official answer
(A)
$\displaystyle 30$ cm
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.