very short note of Sonar for 5 marks.please fast today is exam
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The word sonar is an acronym for sound navigation and ranging. A sonar consists of a transmitter, detector and display. the transmitter produces pulses of ultrasonic waves. These waves travel through water and after striking some underwater object such as seabed or shoal of fish, get reflected and are received by the detector. If the speed of sound in water is approximately 1440 metres per second, the time lapse between the transmitted and reflected echo can be measured and the distance to the object can be calculated. This method of finding distance is called echo ranging. Hope it is useful.
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