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Sonar

On sending an...

Question

On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water is 1400 m $s^{- 1}$ , find the depth of sea.

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Solution

Let depth of the sea $= d$

So, $2 d = v t \Rightarrow 2 d = 1400 \times 1.5 = 2100 ∴ d = 1050 m$

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