When does a wave begin to interact with its bottom?
a. When the bottom is deeper than the wavelength
b. When the bottom is shallower than the wavelength
c. When the bottom is deeper than twice the wavelength
d. When the bottom is shallower than twice the wavelength
ANS: B
A wave is unable to "feel" the bottom if the depth is more than its wavelength. Information can be
found in the section The Behavior of Waves Is Influenced by the Depth of Water through Which They
Are Moving.
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