The development of any science and technology has almost gone through two different processes. The shielding box is no exception. The first is positive research and development, that is, analyzing phenomena, summarizing the rules, forming theories, opening up application areas, and benefiting mankind. However, everything has its opposites. The development and application of a technology will inevitably produce its side effects, especially in a market economy society, driven by interests, the scope and occasions of its application are expanded indefinitely, which in turn leads to the impact on human beings. s damage. At this time, it will inevitably enter another process of the development of the technology, that is, to study the theory and technology of suppressing the side effects caused by the application of the technology, and to standardize the application scope and application occasions of the technology. With the continuous development of this technology, these two processes will be carried out at the same time, complement each other, stimulate and promote each other. Among them, the electromagnetic phenomenon and the process of its development and application is the most typical example. Therefore, reviewing this development process is not only beneficial to the further development of the technology, but also to the development and research of anti-electromagnetic interference theories and technologies. necessary.
Establishment of Basic Experimental Laws of Electromagnetism
Some basic laws of electromagnetics, that is, the discovery and determination of electromagnetic phenomena and their laws, are all discovered and determined experimentally. Therefore, after having some "conjectures" about electromagnetic phenomena, how to design an ingenious It is very important to verify the experimental system/device. The shielding box is also produced through experiments. Discovery and Verification of Coulomb's Law
Coulomb's law, which is the basis of the entire electromagnetic field theory, was first proposed by French physicist Coulomb in 1777. This law describes the law of the interaction of static point charges, and it determines the basic properties of electrostatic fields.