Question

The formula vw=f⋅λ
𝑣
𝑤
=
𝑓
⋅
𝜆
describes the relationship between the speed of a wave (vw
𝑣
𝑤
), and its frequency (f
𝑓
) and wavelength (λ
𝜆
).

For example, if a wave has a frequency of 120 Hz and a wavelength of 5m, it would have a speed of 600 m/s.

In one or two sentences, describe what would happen to the frequency of this wave if the wavelength is increased to 10m but the speed stays the same at 600 m/s.

Answer 1

If the wavelength increases to 10 m while the speed stays 600 m/s, the frequency becomes f = v/λ = 600/10 = 60 Hz. Thus the frequency halves from 120 Hz to 60 Hz.