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प्रश्न
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
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उत्तर
Sonar is a device used to find the depth of a sea through ultrasonic sound waves.
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संबंधित प्रश्न
Explain how defects in a metal block can be detected using ultrasound.
Fill in the blank with suitable word .
Sound waves are caused by ...................
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
What happens to the pitch of a sound if its frequency increases ?
What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
Give one use of ultrasound in industry and one in hospitals.
Write any three applications (or uses) of ultrasound.
Explain how does SONAR work?
Expand the abbreviation of the term SONAR.
