The apparent depth of water in cylindrical water tank of diameter 2R cm is reducing at…
Physics · JEE Advanced · 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 (n1 = refractive index of air, n2 = refractive index of water)
- x π R2 n1/n2
- x π R2 n2/n1
- 2 π R n1/n2
- π R2 x
Answer
(B) x π R 2 n 2 /n 1
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