A real life paradox observed by quantum physicists: when not being observed, there can be a negative number of photons present.
The Economist summarizes the research. The scientific paper is available freely. Wikipedia discusses the paradox at length.
Negative photon numbers observed
A real life paradox observed by quantum physicists: when not being observed, there can be a negative number of photons present.
The Economist summarizes the research. The scientific paper is available freely. Wikipedia discusses the paradox at length.