Question

What does the acronym sonar stand for?

Answer 1

Hint: It is a technique that uses sound for determining the distance and direction under water. This technique also helps submarines to locate their way and also detect the presence of any other submarine present nearby or not. It can also help sea animals to detect prey nearby them and detect the path along which they have to move.

Complete answer:
The full form of SONAR. It’s abbreviated as Sound Navigation and Ranging.
This technique is based on sound propagation which is used for navigation, communication or detection of objects under the surface of water. It uses radar, light waves, and sound waves for detection of objects. SONAR is also helpful for finding and mapping the ocean because sound waves travel farther in the water than radar waves and light waves. Some physics scientists primarily use sonar to develop nautical charts, locate underwater situations to navigate, search for and map objects on the seafloor such as shipwrecks, and map the seafloor itself. There are two types of sonar—active and passive.
There are two types of sonar-
ACTIVE SONAR: In this sound wave is generated by the projector which spreads out and is then reflected back by the object after which the receiver picks up the reflected signal and analyses it and thus determines the range, distance and direction of the object. Active sonar also generates acoustic signals.
PASSIVE SONAR: It only picks up the noise with the receiving sensors produced by the target object. They generally detect signals from marine objects such as ships and submarines or un
APPLICATIONS-
1. MEDICAL USE- It is used for detection of cysts and cancer cells in the body using sonogram.
2. MILITARY USE- It is used for detection of enemy vessels and torpedoes.
3. MARINE USE- It is used for detection of fish or other marine and aquatic life and also various submarines and ships under the oceans.

Note:
One must take care of the letters of acronym that every single letter does not stand for a particular word like SO together stands for sound. It’s not like S stands for one word and O for the other. Similarly RADAR is used for Radio detection and ranging. Single word of RADAR has no meaning at all.