China Has Built a Laser That Can Spot Hidden People, Objects From Over 1 Km Away
4 years ago

China Has Built a Laser That Can Spot Hidden People, Objects From Over 1 Km Away

News 18  

Line-of-sight is very commonly used phrase used to reference things in the field of vision — whether of the human eye or a camera/ telescope/ etc — and it is commonly understood that sight and light are more or less linear. In a video shared by South China Morning Post, the laser-device was able to track a person 1.43 kilometres away, at a diagonal, and hidden behind a screen. The laser emitter was placed within the university campus in urban Shanghai whereas a mannequin was kept behind a screen in the balcony in an apartment building 1.43km away. As the light scattered, some photons reflected off of the mannequin and some others travelled to a sensor located next to the laser emitter.

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