Answer:
Frequency of the wave is 0.2 Hz.
Explanation:
It is given that, the period of a mechanical wave is 5 seconds. We have to find the frequency of the wave. Time period of a wave is defined as the time taken by the wave to complete one cycle and the number of oscillations or vibrations in a medium is called the frequency of the wave.
The relationship between the time period and the frequency of the wave is given by :
\(f=\dfrac{1}{T}\) T = time period
\(f=\dfrac{1}{5\ s}\)
f = 0.2 Hertz
Hence, the correct option is (c) " 0.2 Hz ".
