Normally aloof particles of light seen ricocheting off each other

LHC experiment is first direct evidence of photon-on-photon scattering

two photons bounce off each other

TRAVELING LIGHT  Particles of light can scatter off one another, a new study suggests. Researchers from the ATLAS experiment (illustrated) at the Large Hadron Collider detected events in which two photons (yellow beams) bounced off each other in collisions of lead nuclei.

ATLAS Experiment © 2017 CERN

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