Respuesta :

Frequency because all the other things may have to do with energy but frequency is the one that has to do with number of wavelength passed by a certain point or a certain time

Answer:

Time period

Explanation:

A disturbance that is created in a medium is called a wave. There are many characteristics of a wave i.e. period of wave, frequency, wavelength of a wave etc.

Time period of a wave is defined as the time required for a passage of one wavelength. It is denoted by T. Its relation with the frequency of wave is given as :

[tex]\nu=\dfrac{1}{T}[/tex]

Frequency of a wave is equal to the number of oscillations or vibrations. Hence, the correct option is (a) " time period ".