What are the main devices present in a SONAR which is used to find the distance, direction and speed of underwater objects?

Correct option is C

The correct answer is (c) Transmitter and detector.
· In SONAR (Sound Navigation and Ranging), the main devices used are a transmitter and a detector. The transmitter sends out sound waves (ultrasonic waves) into the water, and when these waves hit an object, they are reflected back. The detector receives these reflected waves and calculates the distance, direction, and speed of the underwater objects based on the time it takes for the echo to return.
Information Booster:
· SONAR is used in submarines, ships, and underwater exploration.
· It functions on the principle of echo-sounding, using sound waves instead of light.
· It can detect objects like underwater mines, submarines, and marine life.
· SONAR is also utilized for mapping the ocean floor.
· The speed of sound in water is approximately 1500 m/s, which is used for calculations. The system is highly effective in detecting objects even in deep water.