Now scientists have discovered the use of lasers to identify explosives.
Lasers can identify chemical powders hundreds of meters away, such as explosives or fertilizers, and the researchers published the findings in the recent Proceedings of the National Academy of Sciences.
At present, the research on using laser to detect explosives has only been successful in the experiment. If it is applied in reality, some efforts may be needed. It is hoped that researchers can overcome various difficulties as soon as possible and develop equipment that can accurately detect explosives.