Wave Interactions. Reflection, Refraction, Diffraction, Interference and Resonance. Which way does a ball bounce?. Wet a tennis ball and complete the following tests: Roll it perpendicular to the wall Roll it at an angle. Reflection.
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Reflection, Refraction, Diffraction, Interference and Resonance
changes speed first
These three (reflection, refraction, and diffraction) are how waves change direction