At what depth do waves begin to slow down and "feel bottom"?
A) At depth equal to twice the wavelength
B) At depth equal to one wavelength
C) At depth equal to ½ wavelength
D) At depth equal to ¼ wavelength
E) Never. Waves don't slow down.

Question

Quizplus · Accepted Answer

Waves begin to slow down and "feel bottom" at a depth equal to ½ wavelength. This is because the wave's orbital motion decreases in size as it gets closer to the bottom, causing the wave speed to decrease.

At What Depth Do Waves Begin to Slow Down and "Feel