Find the minimum and maximum wavelengths of sound in water that is in the audible range (20-20000 Hz) for an average human ear. Speed of sound in water $= 1450 m s^{- 1}$ .

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Solution

(a)For minimum wavelength,

n=20 kHz

$\Rightarrow v = n λ$

$\Rightarrow λ = (\frac{1450}{20 \times 10^{3}})$

=7.25 cm

(b)For maximum wave length n should be minimum

$\Rightarrow v = n λ$

$\Rightarrow λ = (\frac{1450}{20}) = 72.5 m$

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Find the minimum and maximum wavelengths of sound in water that is in the audible range (20-20000 Hz) for an average human ear. Speed of sound in water =1450ms−1.

(a)For minimum wavelength, n=20 kHz ⇒v=nλ ⇒λ=(145020×103) =7.25 cm (b)For maximum wave length n should be minimum ⇒v=nλ ⇒λ=(145020)=72.5m

Find the minimum and maximum wavelengths of sound in water that is in the audible range (20-20000 Hz) for an average human ear. Speed of sound in water $= 1450 m s^{- 1}$ .

(a)For minimum wavelength,

n=20 kHz

$\Rightarrow v = n λ$

$\Rightarrow λ = (\frac{1450}{20 \times 10^{3}})$

=7.25 cm

(b)For maximum wave length n should be minimum

$\Rightarrow v = n λ$

$\Rightarrow λ = (\frac{1450}{20}) = 72.5 m$