This Teaching Astronomy and Space video clip, from the Institute of Physics (IOP), Teachers TV and the Science and Technology Facilities Council (STFC), shows a simple demonstration that can be used to help students understand red shift and blue shift of waves emitted by a moving object.
Using the school yard, students move as if they are light waves being emitted by a star. Observers can see the apparent 'wavelength' of this light. The observers note that when the star is moving, the apparent wavelength is shifted. This demonstrates red and blue shift.
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STFC is a part of the Research Councils UK (RCUK) partnership of research councils.
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Resource by: Institute of Physics
The resource is part of ESERO-UK
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