Question

If the wavelength is tripled, while the speed of the wave is held constant, what happens to the frequency?

A. Decreases to 1/3
B. Decreases to 1/9
C. Increases by 3
D. Increases by 9
E. Stays the same

Answer 1

Answer : A. Decreases to
`(1)/(3)`

Explanation :

We know the relation between speed, wave length and frequency

`v = f * \lambda`

If the wavelength is tripled, while the speed of the wave is held constant the the frequency will decreases to
`(1)/(3)`

So, the frequency will be decreases to
`(1)/(3)`