Question

A wave travels at a constant speed. How does the wavelength change if the frequency is reduced by a factor of 3 ?

A.The wavelength increases by a factor of 3.
B.The wavelength decreases by a factor of 3.
C.The wavelength increases by a factor of 9.
D.The wavelength does not change.

Answer 1

Answer: A. The wavelength increases by a factor of 3.

Step-by-step explanation:

Answer 2

Speed (v) = wavelength (λ) x frequency (f)

If speed is constant and frequency is reduced by factor of 3, you will need to increase wavelength by the same factor so that your changes reduce out.

Answer is A.