The circular motion of water molecules extends to a depth that is equal to:a. wave height/wavelength. b. wave height/wave period. c. wavelength/wave height. d. wavelength/2.e. wavelength/20.

d. wavelength/2.

Explanation:

The circular motion of water molecules extends from regions of shallow water to deep water. It ranges from a depth, H < L/20 for shallow water to a depth of H > L/2 for deep water where L is the wavelength of the wave.

For depths greater than L/2,the circular motion is not affected by the wave energy. So, the maximum depth for the circular motion is L/2 = wavelength/2.

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