Sound waves of wavelength \( \lambda \) travelling in a medium with...

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Sound waves of wavelength \( \lambda \) travelling in a medium with a speed of \( \mathrm{vm} / \mathrm{s} \) enter into another medium where its
\( \mathrm{P} \) speed in \( 2 \mathrm{vm} / \mathrm{s} \). Wavelength of sound waves in the

W second medium is
[NCERT Exemplar]
(a) \( \lambda \)
(b) \( \lambda / 2 \)
(c) \( 2 \lambda \)
(d) \( 4 \lambda \)
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