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Physics · 2025 · 1 mark
CBSE 2025 · Region 5 · Set 1 · Q10
A compound microscope has an objective and an eyepiece of focal lengths f_0 and f_e, respectively. To obtain a large magnification of a small object,…
A compound microscope has an objective and an eyepiece of focal lengths $\displaystyle \mathrm{f}_{0}$ and $\displaystyle \mathrm{f}_{\mathrm{e}}$, respectively. To obtain a large magnification of a small object, the microscope should have :
Official answer
(A)
$\displaystyle \mathrm{f}_{0}$ and $\displaystyle \mathrm{f}_{\mathrm{e}}$ small, and $\displaystyle \mathrm{f}_{\mathrm{e}}>\mathrm{f}_{\mathrm{o}}$
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.