Question

Change in temperature of the medium changes

Answer 1

Speed of sound wave in a medium

\(v=\sqrt{\dfrac{\gamma~RT}{M}}\).

Here \(\gamma,R\) and \(M\) are constant.

Hence, \(v\alpha\sqrt{T}\)

So, if temperature changes, the speed also changes.
As, \(v=ν\lambda\),

where \(ν\) is frequency and \(\lambda\) is wavelength.

As frequency \((ν)\) remains fixed,

\(v~\alpha~\lambda\) or \(\lambda~\alpha~v\)

Therefore, wavelength \((\lambda)\) changes.

Final Answer: (c)