Question

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?

Answer 1

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

B)v=2d/t
   [tex]3 X 10^{8} =2d/2X 10^{-5} [/tex]
⇒2d=6X10³
⇒d=3000m