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.

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.