How is wave refraction different from wave reflection?

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Mevin Wan Wan

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For wave refraction, the speed of the wave is decreased as the wave passes through medium with different refractive indices, giving a different refracted angle compared to the incident angle. However, in the case of wave reflection, the wave speed doesn't decrease and the incident angle is equal to the reflection angle. Here, the incident wave as well as the reflected wave lies on the same plane.

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