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.

A Java applet showing the how wave fronts cause the effect.

Find out how the Doppler effect is used to read the weather, and how it can be used in short term weather prediction.

Explains a variety of concepts related to making waves in water.

See how the particles move, and the graphs for acceleration, velocity and displacement when the sound frequency is changed in this activity.

Learn about the different stages of radio transmission, how radio waves are emitted, and the difference between AM and FM radio.

A diagram of a wave, with labeled parts. Includes an interactive window in which the user can change the frequency of the wave.