Scientists have found a way to build the 'opposite' of a laser — a device that absorbs a specific light wave perfectly. This can be done even in complicated systems, in which waves are scattered randomly, and has many technological applications.
Concept of the laser can be reversed
Scientists have found a way to build the 'opposite' of a laser -- a device that absorbs a specific light wave perfectly. This can be done even in complicated systems, in which waves are scat..
