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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.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
What is ultrasound?
State the approximate speed of ultrasound in air.
A man can hear the sound of frequency :
The properties of ultrasound that make it useful are
What are ultrasonic?
What does SONAR stand for?
State the main components of a hearing aid.
