The protagonist in the movie "Harry Potter" can be seen without a shadow as long as it is covered with an invisibility cloak. According to foreign media reports, the University of Arizona professor is also working with the US Air Force to develop an invisible 3D cloak.

According to reports, Chinese professor of the Department of Electronics and Computer Engineering at the University of Arizona, Xin Yizheng, is working with the US Air Force to study invisible materials that can be made by 3D printing technology, refracting the light around the object, making it cover the things it covers like a cloak. .

The scientific principle of the invisibility cloak is to change the direction of light refraction so that the item looks like it does not exist. Xin Xin tried to use a special porous rubber ball and copper wire to reflect light at an appropriate angle.

In response to the energy loss caused by light refraction, Xin decided to add diodes to provide extra energy. Xin Xin is quite optimistic about the development of related technologies, and believes that in the first year of life, he will be able to see the invisibility cloak.

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