Answer:
Frequency, f = 4 Hz
Explanation:
We have,
Number of waves passing a fixed point are 20
Time, t = 5 seconds
It is required to find the frequency of the wave. Frequency of a wave is defined as the number of waves passing through a point per second. Its mathematical form is given by :
[tex]f=\dfrac{n}{t}\\\\f=\dfrac{20}{5}\\\\f=4\ Hz[/tex]
So, the frequency of the wave is 4 Hz.
