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    Home » How materials that rewind light can test physics’ most extreme ideas
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    How materials that rewind light can test physics’ most extreme ideas

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    How materials that rewind light can test physics’ most extreme ideas
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    For an experiment designed to reverse time, the equipment was surprisingly easy: little greater than a tank of water. With a puff of air to disturb the floor, Emmanuel Fort created a set of ripples transferring outwards in concentric circles. Then, because the waves unfold, he gave the tank a practised jolt – at which level they all of the sudden began travelling inward, refocusing on the level of origin.

    Fort’s work in 2016 was the primary of what has develop into a deluge of experiments by which waves are manipulated, managed and even reversed with unprecedented precision. And as of late, we’re not simply enjoying with water. Researchers have discovered find out how to create a spread of “temporal metamaterials” that can manipulate and rewind electromagnetic waves, together with seen light itself, with ever higher precision.

    The key to those weird materials isn’t a lot the cautious engineering of their spatial association of atoms, however how they work within the fourth dimension, time. Like the speedy jolting of the water tank, temporal metamaterials can transform their properties within the blink of a watch. This creates a sort of boundary that acts like a mirror in time – and it’s this that exerts such delicate energy over waves.

    Not solely are these materials a mind-bending invention, they’ve additionally develop into an unexpectedly wealthy playground by which physicists can test…

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