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प्रश्न
What are infrasonic and ultrasonic sounds?
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उत्तर
Sound having frequency less than 20Hz is called infrasonic sound. Sound having frequency greater than 20KHz is called ultrasonic sound.
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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 ______________.
Complete the following sentence:
Elephants produce ____________sound.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
1000 Hz
Name the sound of the frequency given below:
40 kHz
What do you understand by the term ultrasonic vibrations?
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
Does SONAR make use of infrasonic sound?
What does SONAR stand for? Where do we make use of SONAR?
