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Samir is watching waves hit a beach. He notices that as the waves get closer to the shore (where the water is shallow), they change direction. Which type of wave effect is he seeing?

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sqdancefan

Answer:

  refraction

Explanation:

When a wave crosses a boundary between media at an angle other than normal to the boundary, it will be refracted by an amount depending on the relative speeds of the wave in the different media.

The change in direction that Samir observes is due to refraction of the wave as it slows down in shallower water.

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