Question

The speed of a wave is 65 m/sec. If the wavelength of the wave is 0.8 meters, what is the frequency of the wave?

Answer 1

`81.25 Hz`

Explanation:

If `v` is the speed, `lamda` is the wavelength and the frequency `f` of a wave is given by:

`f=v/lamda`

Here `v=65 m/s`, `lamda=0.8 m`

`implies f=65/0.8=81.25 Hz`

Hence, the frequency of the given wave is `81.25 Hz`.

Answer 2

`81.25` per second

Explanation:

Relation between speed `S` of wave, its wavelength `w` and it frequency `f` is

`S=wxxf`

As speed of a wave is 65 m/sec .and wavelength of the wave is 0.8 meters, the frequency of the wave is given by

`f=65/0.8=81.25` per second