Light propagation is usually reciprocal meaning that the trajectory of light travelling in one direction is identical from that in the opposite direction. Breaking reciprocity can make light propagate ...

In the early 1980s, Japanese physicist Masatoshi Koshiba was constructing a pioneering experimental facility to detect neutrinos from the Sun. Neutrinos are chargeless, invisible and notoriously ...

In a major breakthrough, scientists have observed a strange and previously theoretical form of light — known as negative light. This marks the first time in human history that such a phenomenon has ...