Updating the Size of the Proton: Small Difference, Big Consequence
Optics & Photonics Focus
Volume 10 Story 4 - 26/8/2010

Laser spectroscopy to see the proton size

A complex laser system is needed to perform the muonic hydrogen experiment. The picture shows frequency doubling optics transforming infrared to green light. Photo: PSI / A. Antognini, F. Reiser.
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Laser spectroscopy to see the proton size. A complex laser system is needed to perform the muonic hydrogen experiment. The picture shows frequency doubling optics transforming infrared to green light.