What is the wavelength of ultrasonic waves in air?

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Solution

Step 1- Given Data
Frequency of ultrasonic wave $f = 20000 H z$
Speed of the wave $v = 344 m / s .$
Step 2- To find out the wavelength of the wave-
Since, wave speed $v = λ \times f$
$\Rightarrow λ = \frac{v}{f}$
where $λ$ is the wavelength of the wave
So, $λ = \frac{v}{f} = \frac{344}{20000} = 0.017 m .$
Thus, the wavelength of the ultrasonic wave is $0.017 m .$

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What is the wavelength of ultrasonic waves in air?

Step 1- Given DataFrequency of ultrasonic wave f=20000HzSpeed of the wave v=344m/s.Step 2- To find out the wavelength of the wave-Since, wave speedv=λ×f⇒λ=vfwhere λis the wavelength of the waveSo, λ=vf=34420000=0.017m.Thus, the wavelength of the ultrasonic wave is 0.017m.