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Q.

What is the factor that differentiates an ultrasonic wave from an infrasonic wave?


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a

Wavelength

b

Time

c

Frequency

d

Velocity  

answer is C.

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Detailed Solution

The factor that differentiates an ultrasonic wave from an infrasonic wave is frequency.
Infrasonic sound waves are those with frequencies below 20 Hz that are audible. For example, volcanoes, earthquakes, and thunder emit sound in the infrasonic range. Elephants and whales can hear this sound, but human ears cannot. Ultrasonic waves are those that are above the frequency of 20,000 Hz. Therefore frequency is the deciding factor of differentiation.
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