Summary

DescriptionKundig experiment.svg	English: Author: User:Stigmatella aurantiaca
Date	10 July 2012 (original upload date)
Source	Own work
Author	User:Stigmatella aurantiaca
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Source: Own work, created with Inkscape

Description: The Kündig experiment (1963). An Fe⁵⁷ Mössbauer absorber was mounted 9.3 cm from the axis of an ultracentrifuge rotor. A Co⁵⁷ source was mounted on a piezoelectric transducer (PZT) at the rotor center. Spinning the rotor caused the source and absorber to fall out of resonance. A modulated voltage applied to the PZT set the source in radial motion relative to the absorber, so that the amount of conventional Doppler shift that would restore resonance could be measured. For example, withdrawing the source at 195 microns per second produced a conventional Doppler redshift equivalent to spinning the absorber at 35,000 rpm.

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