Traditional Culture Encyclopedia - Traditional customs - What is a black light?
What is a black light?
Light particles reflect from the surface of the object and enter the human eye, forming vision. There is no reflection, that is, no visible light is accepted by our eyes. We see that an object is black because all the light in the visible wavelength range is absorbed by this object. If this object is regarded as a light source, then a black light source is a light source without visible light.
There is a kind of fluorescent lamp called black light, but it can see blue light, mainly ultraviolet light, which is used to attract insects, because insects are very attractive to this light, and then it is destroyed by high-voltage electricity or medicine. This is the light source used by restaurants to kill flies.
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