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The apparent depth of water in cylindric...

The apparent depth of water in cylindrical water tank of diameter `2R cm` is reducing at the rate of `x cm // min ` when water is being drained out at a constant rate. The amount of water drained in `c.c.` per minute is `(n_(1)=` refractive index of air, `n_(2)=` refractive index of water )

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The correct Answer is:
`(x pi R^(2)n_(2))/n_(1)`
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MOTION-GEOMETRICAL OPTICS-Exercise 3 Level - II (Section F - Snells Law, Apparent depth and Normal shift, Refraction through a Glass slab, Lateral shift)
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