For over a hundred years scientists have known that light is both a wave and a particle, but no one has been able to show it doing both at the same time. Now, an experiment done at the École Polytechnique Fédérale de Lausanne has produced an electron microscopic photograph that proves it.
Einstein won a Noble Prize for proposing that light is both a wave and a particle. Since then, experiments have confirmed that light indeed acts like a wave and also a particle. However, no one has seen light acting like both at the same time until now. Scientists at the EPFL conducted an experiment where they “trapped” light on a metallic wire and shot a stream of electrons at the wire. Using an electron microscope, they were able to see the exchange of energy that resulted from the light photons and electrons bumping into each other.