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A) Explain the working of SONAR.

b) A radar signal is reflected by an aeroplane and is received 2 ×  10^{-5} sec after it was sent. If the speed of these waves is 3 ×  10^{8} m/s. How far is the aeroplane from radar?


A) SONAR which stands for Sound Navigation and Ranging is used to navigate and find out the location of objects .It works on the Principle of Echo-location.An ultrasonic sound wave is sent and the time taken by it to return is noted.and the distace of the object is found out ny the formula .: v=2d/t

 3 X 10^{8} =2d/2X 10^{-5} 

2 4 2
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