Antimatter keeps with quantum theory. It’s both particle and wave

A variation of the classic double-slit experiment is applied to a positron for the first time

double-slit experiment illustration

MAKING WAVES  The famous double-slit experiment (illustrated) has revealed that particles of matter, like electrons, are also waves. Now, researchers have performed a similar experiment to demonstrate antimatter’s wavelike behavior.

RUSSELL KIGHTLEY/Science Source

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