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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
How is ultrasound used for cleaning?
How does the pitch of a sound depend on frequency ?
What happens to the loudness of a sound if its amplitude decreases ?
Fill in the blank with suitable word :
Loudness of sound depends on .....................
Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
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, bats use ultrasound to catch the prey.
Write any three applications (or uses) of ultrasound.
The ultrasound waves can penetrate into matter to a large extent because they have :
The depth of an ocean can be determined by ______.
