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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
Give two practical applications of reflection of sound waves.
Name the unit used to measure the loudness of sound. Also write its symbol.
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 ?
Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
What is sonar ? Explain its use.
In SONAR we use:
Expand the abbreviation of the term SONAR.
