Question

When you speak to you friend, which of the following parameters have a unique value in the sound produced?

• A. Frequency
• B. Wavelength
• C. Amplitude
• D. Wave velocity

Answer 1

The correct option is D

Wave velocity

Wave velocity is a parameter that totally dependent on the Medium $\sqrt{\frac{B}{\rho }}$ so that will be Unique.

Frequency is a parameter that is dependent on the source. That is your vocal chords.

Amplitude determines the loudness of a sound. That again depends on you.

You can talk loud or soft.

Wavelength $\lambda$ = $\frac{\upsilon }{f}$

We just saw above that v is unique, but f is not.So can $\lambda$ be unique?

Nope.

So (d) is the right answer.