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प्रश्न
What is ultrasound?
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उत्तर
Sounds of frequency above 20 kHz are called ultrasound.
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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:
40 kHz
Name three animals which can hear ultrasonic vibrations.
State four practical uses of 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.
What are ultrasonic? State and explain two applications of ultrasounds.
What does SONAR stand for? Where do we make use of SONAR?
State the main components of a hearing aid.
Bats produce ______ sound during screaming.
