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Physics-

General

Easy

Question

A fixed cylindrical tank of height H=4 m and area $A$ , is filled up with a liquid. An observer through a telescope fitted at the top of the wall of the tank and inclined at $theta equals 45 to the power of ring operator end exponent$ with the vertical. When the tank is completely filled with liquid, he notices an insect, which is at the centre of the bottom of the tank. At t=0, he opens a cork of area a at the bottom of the tank. The insect moves in such a way that it is visible for a certain time. Find the refractive indexof the liquid

$\frac{5}{3 \sqrt{2}}$
$\frac{5}{\sqrt{2}}$
$\frac{3}{5 \sqrt{2}}$
$\frac{1}{10 \sqrt{2}}$

The correct answer is: $fraction numerator 5 over denominator 3 square root of 2 end fraction$

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Velocity of image along ' $x$ ' direction is ___________ ms^–1

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