Ripple

In physics, ripples are surface waves on a liquid with wavelengths so short that the liquid's motion is governed almost entirely by surface tension forces. The wavelength of a ripple must be less than

where γ is

In physics, ripples are surface waves on a liquid with wavelengths so short that the liquid's motion is governed almost entirely by surface tension forces. The wavelength of a ripple must be less than

where γ is surface tension and ρ is liquid density. For water, λc = 1.7cm.