It doesn't involve magic but mirrors and lenses.
Direct absorption of light can bring great improvements in both the design and technology of the devices we use on a daily basis. The researchers believe that trapping or “harvesting”
of many important processes in science, engineering, and nature. It has the potential to enhance the performance of spectrally selective detectors and future light-powered devices.The researchers designed a cavity in which multiple mirrors and lenses surrounded a thin light-absorbing medium. They arranged the mirrors and lenses in such a way that when a light ray entered the cavity, it started to move in a circular fashion eventually, blocking its own path.
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