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प्रश्न
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
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उत्तर
To discover a sunken ship or objects deep inside the sea, SONAR technology is used.
Explanation:
The technology of SONAR (Sound navigation and ranging) is used to estimate the distance and location of underwater objects. A transmitter and a detector are fitted in a ship to do this.
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संबंधित प्रश्न
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Explain how defects in a metal block can be detected using ultrasound.
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
Fill in the blank with suitable word .
Sound waves are caused by ...................
Name the three characteristics of sound.
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
What happens to the loudness of a sound if its amplitude decreases ?
What name is given to sound waves of frequencies higher than 20 kHz ?
What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
Name an animal which navigates and finds food by ecolocation.
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
What type of waves are generated by SONAR device fixed to a fishing ship ?
Explain how does SONAR work?
Expand the abbreviation of the term SONAR.
