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प्रश्न
The properties of ultrasound that make it useful are
पर्याय
High power and high speed
High power and good directivity
High frequency and high speed
High frequency and bending around the objects.
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उत्तर
The properties of ultrasound that make it useful are High power and good directivity
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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 |
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| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Which has the higher frequency - ultrasonic sound or infrasonic sound?
Complete the following sentence:
Elephants produce ____________sound.
State the approximate speed of ultrasound in air.
A man can hear the sound of frequency :
What is Galton’s whistle? To what use is it put?
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
What does SONAR stand for? Where do we make use of SONAR?
State the properties of ultrasound that make it useful.
1 hertz is equal to
