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प्रश्न
What is echocardiography?
एक पंक्ति में उत्तर
उत्तर
Echocardiography is used to obtain the image of the heart by the used of ultrasonic waves.
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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.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
100 Hz
Sonar makes use of :
What do you understand by the term infrasonic vibrations?
What do you understand by the term ultrasonic vibrations?
How do bats locate their prey during a flight?
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
Ultrasound has frequency of vibration
Bats produce ______ sound during screaming.
