The speed of propagation, $c$, of a capillary wave depends on the density of the fluid, $\rho$, the wavelength of the wave, $\lambda$, and the surface tension, $\sigma$. If the density and wavelength remain constant, halving the surface tension would lead to a new velocity, $c^{\prime}$, given by
- $c^{\prime}=2 c$
- $c^{\prime}=\sqrt{2} c$
- $c^{\prime}=\frac{c}{\sqrt{2}}$
- $c^{\prime}=c$
