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प्रश्न
What are ultrasonic?
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उत्तर
Ultrasonic are sounds having frequency higher that 20 KHz and not audible to the human being.
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संबंधित प्रश्न
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 ______________.
Name the sound of the frequency given below:
1000 Hz
Name the sound of the frequency given below:
40 kHz
A man can hear the sound of frequency :
What do you understand by the term infrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
How do bats locate their prey during a flight?
The sonic boom of an aircraft has a time period of 0.00005s. Calculate the frequency of sound produced.
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
