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.
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.