YouTuber and US inventor Styropyro has assembled and tested a 250-watt handheld laser. VIDEO: https://www.youtube.com/watch?v=UBVlL0FNbSE According to him, the laser system he created is 50 thousand times more powerful than laser pointers. Probably, his laser is much more powerful than it can be allowed by american law. This, however, did not stop Styropyro from testing its own development. In a video of the results of field tests, the YouTuber burned several objects and even left burn marks on diamonds. The most common type of handheld lasers are laser pointers, which are mainly used in educational institutions. The power of their...