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प्रश्न
State the properties of ultrasound that make it useful.
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उत्तर
High Power , High Energy and good directionality are the properties of ultrasonic sounds which makes them useful.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Name the sound of the frequency given below:
40 kHz
Can you hear the sound produced due to vibrations of a seconds pendulum? Give reasons.
State the approximate speed of ultrasound in air.
A man can hear the sound of frequency :
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
What are ultrasonic? State and explain two applications of ultrasounds.
What are hearing aids?
1 hertz is equal to
