Sound waves of wave length X travel from a medium in which velocity is V m/s into
another medium in which if velocity is 3 m/s is the wavelength of sound in the second
medium.
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We know Velocity (V) ∝Wavelength (λ)⇒Vλ=constant⇒V1λ1=V2λ2velocity in first mediumWavelength in first medium=velocity in second mediumWavelength in secondmedium⇒Vλ=3VWavelength in second medium⇒Wavelength in second medium=3λ
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