Question

What is the full form of SONAR?
(A) System of Navigation and Research
(B) Sound Navigation and Ranging
(C) Sound of Natural Agriculture Research
(D) Sound of Navigation and Research

Answer 1

Hint:SONAR is abbreviated as Sound Navigation and Ranging. Sound waves reflected or emitted by the object are detected by sonar apparatus and analyzed for the information they contain.


 Complete step by step solution:
It is mainly used for exploring and mapping the ocean. This is because sound waves travel farther in the water rather than radar or light waves. They are used for military purposes to identify and locate submarines. Sonar is also used in acoustic homing torpedoes, in acoustic mines, and mine detection.
So the correct option for the above question is B- Sound Navigation and Ranging

Note:
This technique is used to detect and determine the direction and the distance underwater through sound waves. These SONAR systems may be divided into two systems
Active Sonar
Passive Sonar
Active Sonar:
 An active sonar transducer produces an acoustic signal or pulse of its own to produce echoes. It consists of both transmitter and receiver. This echo is returned to sonar transducers. If the transducer is outfitted with the capacity to get signals, it estimates the strength of the sign. By deciding the time between the outflow of the sound pulse and its reception, the transducer can decide the reach and direction of the item. Active sonar can detect marine mammals in shipping lanes or high sound pressure zones.
Passive Sonar:
Passive sonar consists of the receiver part only. Unlike active transducers they do not produce sound waves of their own, rather they receive sound waves produced from the sea animals. They emit sound waves for communication. This has its advantage for military vessels that do not want to be found. As it does not transmit waves, it is considered to be safe for sea animals compared to the active sonar type.