Working principle of UV lamp

 Electromagnetism, one of the physical concepts, is a general term for the electrical and magnetic properties of matter. Such as electromagnetic induction, electromagnetic waves and so on. The electromagnetic phenomenon was first discovered by Faraday. The electromagnetic phenomenon is caused by the fluctuation of electric charge movement. A magnetic field is formed, so all electromagnetic phenomena are inseparable from the magnetic field. Electromagnetism is a branch of physics that studies the phenomenon of electromagnetic and electromagnetic interaction, and its laws and applications. Maxwell's hypothesis about changing the electric field to produce the magnetic field established the entire theoretical system of electromagnetics, developed the electrical and electronic technologies that had a major impact on modern civilization, and profoundly affected people's thinking about the material world.

Moving charges can produce fluctuations. Its fluctuation mechanism is: when the moving charge e moves, it must be hindered by its adjacent e, which is manifested as the moving charge drives its adjacent 1 to move upwards, that is, the adjacent moves upwards with the moving charge e; when the adjacent 1 moves upwards, it must be affected by it. Adjacent to itself is obstructed, which means that adjacent 1 drives its adjacent upward movement, that is, adjacent 2 moves upward along with adjacent 1.... In this way, it spreads forward and forms fluctuations. Obviously, the propagation speed of this wave in vacuum is the speed of UV light.

What effect does the fluctuation of the moving charge have on the small magnetic needle? Let's analyze it by taking linear current as an example. The small magnetic needle N is on the right side of the linear current I. When the small magnetic needle N is simplified into a circular current abcd, although points a, b, c, and d are within the fluctuation range of the linear current I, points a, b, The energy of adjacent movement at c and d varies. Obviously, Ea>Ec, Eb=Ed. In this way, the fluctuation of the linear current I has a clockwise moment to the circular current abcd of the small magnetic needle N. The moment acts on the electrons rotating around the nucleus to make it rotate clockwise. The macroscopic expression is that the north pole of the small magnetic needle N is perpendicular to the paper surface outward.