The apparent depth of water in cylindrical water tank of diameter 2R cm is reducing at…
Physics · JEE Main · NTA Exams — Optics
The apparent depth of water in cylindrical water tank of diameter 2R cm is reducing at the rate of x cm/minute when water is being drained out at a constant rate. The amount of water drained in c.c. per minute is (\(\mathrm{n}_{1}\)= refractive index of air, \(\mathbf{n}_{2}\) = refractive index of water)
- \(\begin{array}{l} \mathrm{xR} \mathrm{n} \\ \hline \end{array}\)
- \(\begin{array}{c} \mathrm{xR} \mathrm{n} \\ \hline \end{array}\)
- \(2 \mathrm{Rn}\)
- \(\mathrm{R} \mathrm{x}\)
Answer
(B) array c xR n array
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