Question

A wave has a wavelength of 15mm and a frequency of 4 hertz, what is its speed?

Answer 1

The speed of the wave is 15 mm/s.

The frequency `f` and wavelength `λ` are related to one another and to the speed of the wave `v` by the formula

`fλ = v`

`v` = 15 mm × 4 s⁻¹ = 60 mm/s