To find the wavelength of a wave when you know its frequency and speed, you can use the formula:
Wavelength = Speed / Frequency
In this formula, the speed represents the speed of the wave, which could be the speed of light in a vacuum (approximately 3.00 x 10^8 meters per second) or the speed of the wave in a specific medium. The frequency is the number of wave cycles that pass a certain point in one second, measured in Hertz (Hz).
By dividing the speed by the frequency, you will obtain the wavelength of the wave in the same unit as the speed. For example, if the speed is given in meters per second, and the frequency is given in Hertz, the resulting wavelength will be in meters.
It's important to ensure that the units of speed and frequency are compatible and consistent in order to obtain the correct wavelength.