Originally Posted by
TriKri According to a book I have, called Physics Handbook, the speed c of a wave can be given by the formulas
$\displaystyle \begin{array}{ll}
c=\sqrt{gd} & \text{for } d\lesssim\lambda/12 \\ \\
c=\sqrt{\displaystyle\frac{g\lambda}{2\pi}+\displa ystyle\frac{2\pi S}{\rho\lambda}} & \text{for } d\gtrsim\lambda/4
\end{matrix}$
but at wikipedia, you will only find this formula
$\displaystyle c=\displaystyle\sqrt{\frac{g \lambda}{2\pi} \tanh \left(\frac{2\pi d}{\lambda}\right)}$
Seems like there are some different opinions about what the formula should look like.