What occurs when waves hit an obstacle straight on?

a. Wave refraction
b. Wave diffraction
c. Wave dispersion
d. Wave reflection


ANS: D
When waves hit an obstacle straight on, they reflect back towards the direction they came from. This
causes interference to the vertical oscillations. Information can be found in the section Deep-Water
Waves Change to Shallow-Water Waves As They Approach Shore

Environmental & Atmospheric Sciences

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Two species of frogs do not interbreed because one species breeds in March and the other species breeds in May. This is an example of

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