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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
Give two practical applications of reflection of sound waves.
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.
Define the 'frequency' and 'time-period' of a wave. What is the relation between the two?
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
What name is given to sound waves of frequencies higher than 20 kHz ?
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
Write any three applications (or uses) of ultrasound.
Define the following terms : (a) Echolocation (b) Echocardiography, and (c) Ultrasonography.
Name an animal which navigates and finds food by ecolocation.
In SONAR we use:
