The diameter of a water molecule's orbit increases with depth until the wave reaches the seafloor.

Question

Quizplus · Accepted Answer

The statement seems to confuse the behavior of water molecules in waves with the concept of wave base. In reality, water molecules move in circular orbits whose diameter decreases with depth, not increases. Waves affect the water down to a depth of about half their wavelength, below which water is largely undisturbed.

The Diameter of a Water Molecule's Orbit Increases with Depth