A wave is a disturbance that propagates through space, often transferring energy. While a mechanical wave exists in a medium (which on deformation is capable of producing elastic restoring forces), waves of electromagnetic radiation (and probably gravitational radiation) can travel through vacuum, that is, without a medium. Waves travel and transfer energy from one point to another, with little or no permanent displacement of the particles of the medium (there is little or no associated mass transport); instead there are oscillations around fixed positions.
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Doppler Effect Activity - This shockwave activity shows the way that waves originate from a single moving source, and provides a link to the same activity using two sources.
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Doppler Effect Demonstration - A Java applet showing the how wave fronts cause the effect.
Meta Description: [ Java Applet: Doppler Effect ]
Doppler Radar is a Key Forecasting Tool - Find out how the Doppler effect is used to read the weather, and how it can be used in short term weather prediction.
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How Wave Pools Work - Explains a variety of concepts related to making waves in water.
Meta Description: [ When the heat sets in, there’s nothing like a day at the water park to cool things down -- water parks and their massive wave pools are a huge weekend attraction. Ever wonder what kind of machinery it takes to produce a wave? Learn exactly how an ocean-like surf is created. ]
Longitudinal Wave Activity - See how the particles move, and the graphs for acceleration, velocity and displacement when the sound frequency is changed in this activity.
Meta Description: [ World's largest and most advanced online repository of math and science simulations for grades 6-12. research-proven, inquiry-based learning tools for teachers and students. Web-based for anytime, anywhere learning. ]
Radio Transmission - Learn about the different stages of radio transmission, how radio waves are emitted, and the difference between AM and FM radio.
Wave Parts - A diagram of a wave, with labeled parts. Includes an interactive window in which the user can change the frequency of the wave.
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