What is the full form of SONAR?Write the principle,working and use of SONAR
According to class 8
Answers
Answer:
SONAR stands for sound navigation ranging .
Sonar is the acoustic equivalent of radar. Sound waves from different forms of energy are transmitted over long distances in deep sea, which is important for the military. Therefore, for detecting underwater targets, sonar technology has risen to the challenge.
Principle: It uses echoes in to determine the sea-depth and locating the presence of objects underwater.
Working:
It consists of a transmitter and a detector and is installed in a ship or a boat.
The transmitter in SONAR produces and transmits powerful ultrasonic waves.
The ultrasonic waves travel through the water and after striking the target the beam is reflected from the seabed and is received by an under-water detector (mounted on the ship).
The detector then converts the waves into electrical signals which are properly interpreted.
The time interval between transmission and reception of the signal is also noted.
Application: It is used for the detection of enemy vessels and torpedo by the military.
Sonar also finds application in inspecting pipelines that carry oil and gas for detecting possible damages.