When a beam of light passes through a cloud of atoms, photons (particles of light) sometimes appear to spend a negative amount of time there, with light seeming to exit the cloud before it even enters ...
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World’s most powerful X-ray laser makes krypton absorb 100x more light for double core-hole
Researchers at the European XFEL have made major progress in understanding how light interacts with matter at the quantum level after they achieved a 100-fold boost in photoionization efficiency. The ...
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