Here's why:
* The speed of a wave depends on both wavelength and frequency.
* Wavelength is the distance between two consecutive crests or troughs of a wave.
* Frequency is the number of waves passing a point in a given time (usually measured in Hertz, Hz).
* The relationship is: Speed = Wavelength x Frequency
To find the speed of a wave, you need to know BOTH its wavelength AND its frequency.
