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Scientists have long known that light can sometimes appear to exit a material before entering it – an effect dismissed as an illusion caused by how waves are distorted by matter.
"This is tough stuff, even for us to talk about with other physicists. We get misunderstood all the time," said Aephraim Steinberg, a University of Toronto professor specializing in experimental quantum physics. What Angulo and colleagues demonstrated was akin to measuring carbon monoxide levels in the tunnel after the first few cars emerged and finding that the readings had a minus sign in front of them.The experiments, conducted in a cluttered basement laboratory bristling with wires and aluminum-wrapped devices, took over two years to optimize. The lasers used had to be carefully calibrated to avoid distorting the results.
Instead of adhering to a fixed timeline for absorption and re-emission, these interactions occur across a spectrum of possible durations – some of which defy everyday intuition., which dictates that nothing can travel faster than light. These photons carried no information, sidestepping any cosmic speed limits.The concept of"negative time" has drawn both fascination and skepticism, particularly from prominent voices in the scientific community.
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