Light’s weird dual nature weathers trip to space and back
‘Delayed-choice’ test, a first with spacefaring photons, affirms light can behave like a wave or a particle
THERE AND BACK AGAIN Light retains a double life, acting like either a particle or a wave. To test this idea in space, scientists sent light through a setup (shown) to a satellite and back.
QuantumFuture Research Group/University of Padova-DEI 2017