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Instructional Video
Khan Academy: Seismic Waves and Earth's Structure: Refraction of Seismic Waves Instructional Video
Khan Academy

Khan Academy: Seismic Waves and Earth's Structure: Refraction of Seismic Waves

9th - 10th
Explains how any type of wave can be refracted, and how this applies to seismic waves and to our understanding of the Earth's structure. [9:21]
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