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WAVE INTERACTIONS. REFLECTION. bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through. FREE BOUNDARY. travels in opposite direction to direction of original wave. FIXED BOUNDARY. waves reflect and turn upside down . DIFFRACTION.
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REFLECTION • bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through.
FREE BOUNDARY • travels in opposite direction to direction of original wave.
FIXED BOUNDARY • waves reflect and turn upside down.
DIFFRACTION • bending of a wave around the edge of an object.
REFRACTION • bending of a wave caused by a change in speed as the wave moves from one medium to another.
INTERFERENCE • combination of two or more waves of same frequency that results in a single wave.
CONSTRUCTIVE INTERFERENCE • any interference in which waves combine so that resulting wave is bigger than original waves. • Increases amplitude.
DESTRUCTIVE INTERFERENCE • any interference in which waves combine so that resulting wave is smaller than largest of original waves. • decreases amplitude • Light waves create colorful displays. • sound waves produces beats.
STANDING WAVES • pattern of vibration that simulates a wave that is standing still.
NODES • Area of standing wave that is separated from next loop by points that have no vibration • lie at points where crests of original waves meet troughs of reflected waves • causes complete destructive interference.
NODES node
ANTINODES • form where crests of original waves line up with crests of the reflected waves • causing complete constructive interference.
ANTINODES antinode