Ever wonder why a siren sounds different when it's coming toward you than when it's going away from you? It all depends on the motion of the sound waves! The interactive activity demonstrates how the Doppler effect impacts the motion of...

The study of waves is not a quacking matter! Watch as a duck manipulates the behavior of its waves through its motion. Graphs show the frequency and wavelength of the waves. 

A simulation of the Doppler Effect, where a change in wave frequency can be observed from the reference frame of the wave source, an observer, or the medium.

[Free Registration/Login Required] Why do ducks make a 'V' shape in the water when they swim? Explore the doppler effect using this interactive simulation.

This lab is designed to have students investigate the changes to wavelength and frequency that occur when the source of the waves is in motion. This video describes the lab: https://youtu.be/eCceYPBR6f4

This journey will help you solve big questions about the universe. You will be able to see beyond human capabilities and will learn what scientists are discovering.

This site, in German, offers numerous apps that illustrate common physics principles. Apps are organized into categories: mechanics, oscillations and waves, electrodynamics, optics, thermodynamics, the theory of relativity, physics of...