Pound-Rebka experiment facts for kids

The Pound-Rebka experiment was an experiment by Robert Pound, and Glen Rebka that was done in 1960. In his general theory of relativity, Albert Einstein predicted that gravitation would influence photons the same way it did massive particles: Photons gain energy when traveling toward a gravitational source (the Earth). The experiment measures the change of frequency of light moving in a gravitational field. In this case, the effect was a blue shift, the energy increased.

Images for kids

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  Jefferson laboratory at Harvard University. The experiment occurred in the left "tower". The attic was later extended in 2004.

See also

In Spanish: Experimento de Pound y Rebka para niños