Produced by the Institute of Physics, these activities demonstrate the Doppler effect.

Using sound and microwaves, the activities illustrate how changes in wavelength of spectral lines allow us to determine the motion of astronomical objects relative to ourselves.

The activities include:
*...

Produced by the Institute of Physics, in this learning episode, students look at the expanding universe by examining galaxies, Hubble's observations and cosmological red shift. A simple activity allows students to model Hubble's law.

Through discussion and activities, students look at:
* observing a...