We all know from science class that light is both a wave and a particle. While scientists have observed this, they have never been able to observe both states at the same time until a “breakthrough” experiment. The researchers used electrons to take an image of a wave of light to create the “paradoxical” snapshot of light.
As the researchers from Ecole Poytechnique Federale de Lausanne (EPFL) explain, Albert Einstein discovered the "photoelectric effect" -- metals emit electrons when hit by UV light -- which proved light is a wave and a stream of particles. This discovery won Einstein the 1921 Nobel Prize in Physics. Experiments have shown light as a wave and as a particle, but taking a family photo had been elusive before the EPFL experiment.
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