Contact: Josh Chamot
National Science Foundation
Caption: This picture shows an actual image of a coherent (laser-like) X-ray beam. In contrast to the incoherent (light-bulb-like) light emitted in all directions from a Roentgen X-ray tube, the X-rays produced by high harmonic generation emerge as well-directed, laser-like, beams.
Credit: Tenio Popmintchev, JILA and University of Colorado at Boulder
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