Scientists use the same types of terms to describe ocean waves that we use to describe sine waves. The wave period is the time between crests and the wavelength is the distance between crests. The wave height is the vertical distance from the trough to the crest. The figure below shows a swell in the coordinate system. Write an equation for the swell, assuming that its shape is that of a sinusoid. {Crest 1' E2 1 ..' g l