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7th Grade Sound & Li

7th Gr. Prentice Hall - Chapter 1 Sound & Light Sec. 3 & 4

QuestionAnswer
law of reflection the angle of incidence equals the angle of reflection
refraction the bending of waves due to a change in speed
diffraction when a wave moves around a barrier or through an opening in a barrier causing it to bend or spread out
interference the interaction between waves that meet
constructive interference when the interference results in a larger amplitude in the wave
destructive interference when the interference results in smaller amplitude in the wave
nodes the points of zero amplitude on a standing wave
antinodes the ponts of maximum amplitude on a standing wave
resonance an increase in the amplitude of a vibration when external vibrations match an object's natural frequency
seismic waves waves produced by earthquakes
P waves longitudinal seismic waves or primary waves
S waves transverse seismic waves or secondary waves
surface wave combination of a longitudinal wave and a transverse wave that travels along the surface of a medium
tsunamis huge surface waves produces by underwater earthquakes
seismograph instrument that detect and measure earthquake waves
Created by: Karen Copanic
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