Question

When a sound wave enters from one medium to another, the following parameters will vary

• A. frequency and wavelength
• B. frequency and wave velocity
• C. velocity and wavelength
• D. velocity and frequency

Answer 1

Answer: (C)

velocity and wavelength

We know that for a wave, $\text{Velocity}=\text{frequency}\times \text{wavelength}$

The frequency of a sound wave is the characteristic of the source and it does not vary when the wave moves from one medium to another medium.

So, the velocity and the wavelength of the sound wave changes by changing the medium.
The correct option is (c)