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Physics · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 1 · Q9
A tub is filled with a transparent liquid to a height of 30.0 cm. The apparent depth of a coin lying at the bottom of the tub is found to be 16.0 cm.…
A tub is filled with a transparent liquid to a height of $\displaystyle 30.0$ cm. The apparent depth of a coin lying at the bottom of the tub is found to be $\displaystyle 16.0$ cm. The speed of light in the liquid will be
Official answer
(A)
$\displaystyle 1.6 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}$
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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.