The speed of a wave is defined as
v = λ (wavelength) * f (frequency)
Assuming a constant speed for the wave
λ (wavelength) = v/f (frequency)
or,
f (frequency) = v/ λ (wavelength)
This shows the inverse relation that exists between the frequency and the wavelength.
As the frequency increases, the wavelength becomes smaller.
Similarly, if we increase the wavelength, the frequency decreases.
If we were on a boat over water waves with smaller and smaller wavelengths, the boat would be rocking from side side, as we would feel the effects of the rapidly increasing waves.
