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According to the British "Times" report, scientists have devised a material that can bend the visible light around an object, and the invisible devices that have long existed in science fiction have come closer and closer to reality. Driven by this major breakthrough, the dream of invisible vessels and other large objects will come true within a few years. The secret to achieving hidden objects from microwaves to visible light lies in changing the direction of visible light travel around the object. With funding from the U.S. Army, researchers at the University of California, Berkeley, have devised a material that controls the direction of light. Two of the world's leading science journals, Science and Nature, are due to publish the study this week. Scientists at Duke University in the United States and Imperial College London have previously published similar results, only studying microwaves. Like light, microwaves are also a form of electromagnetic radiation, but microwaves have longer wavelengths, making them easier to control. So this time scientists get the same result with visible light is a huge step forward. Stealth material can bend light The researchers' leader, Zhang Xiang, said: "Invisibility cloaks, like invisible water, flow around a rock and the material that makes up it must bend light waves around the object completely." Look at this The person invisible cloak will see the light behind it, which makes the object appear to disappear. The material that produces this effect is known as "Meta-materials," which "trap" the electromagnetic radiation and deflect it smoothly. There is no substance in nature that produces this effect, and nano-engineering and operational problems at the atomic and molecular levels have been substantially increased in the past few years, giving scientists the opportunity to make such materials. The subtlety of this material that researchers have to work on is very surprising. Zhang Xiang's researchers must design a material whose composition does not exceed about sixty-six thousandths of a meter in diameter. Zhang Xiang's U.S. military fund for his research shows that the technology it might adopt opens up a new era of stealth technology. (A02)