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प्रश्न
Sonar makes use of :
पर्याय
infrasonic sound
ultrasound
ordinary sound
light
MCQ
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उत्तर
Sonar makes use of : ultrasound
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
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| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Can you hear the sound produced due to vibrations of a seconds pendulum? Give reasons.
State the approximate speed of ultrasound in air.
What is Galton’s whistle? To what use is it put?
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
What does SONAR stand for?
Does SONAR make use of infrasonic sound?
What are infrasonic and ultrasonic sounds?
What is echocardiography?
State the properties of ultrasound that make it useful.
