The relationship between wavelength and frequency is given by the formula:
v = fλ
where:
v is the wave velocity
f is the frequency
λ is the wavelength
As can be seen from the formula, the velocity of a wave is equal to the product of its frequency and wavelength. This means that if the velocity of a wave is constant, then the frequency and wavelength must be inversely proportional. In other words, as the wavelength increases, the frequency decreases, and vice versa.
This relationship can be seen in the electromagnetic spectrum. Radio waves have the longest wavelengths and the lowest frequencies, while gamma rays have the shortest wavelengths and the highest frequencies.