The figure given below shows the sound navigation system. It takes 2 s to record the echo of SONAR. If the speed of sound in water is 1450 m/s. Find out
- the depth of the floor
- wavelength of ultrasonic waves if the frequency is 20 kHz.
- Given that it takes 2 s to record the echo of SONAR.
So, the time taken by the ultrasound to travel from the ship to the sea bed will be half this time, which is
- Given that frequency = 20 kHz
Speed = Frequency × Wavelength
1450 = 20 × λ
→ λ = 72.5 m
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