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प्रश्न
State two applications of ultrasound.
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उत्तर १
Two applications of ultrasound:
(i) Ultrasound is used for drilling holes or making cuts of desired shape in materials like glass.
(ii) Ultrasound is used in surgery to remove cataract and in kidneys to break the small stones into fine grains.
उत्तर २
Applications of Ultrasonic sound
(i) Ultrasonic sound is used to detect the flaws in metal castings of automobile tyres.
(ii) It is used in hospitals to detect defects in certain parts of the body.
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.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
40 kHz
State the approximate speed of ultrasound in air.
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
What are infrasonic and ultrasonic sounds?
Is the energy carried by the ultrasound very high or very low?
What does SONAR stand for? Where do we make use of SONAR?
What are hearing aids?
1 hertz is equal to
