Maxwell showed that light was a vibration in the electromagnetic field, and that it travelled at a constant speed, c, in a vacuum.
马克思·威尔指出光是种电磁波，其在真空中的传播速度是个常数c。
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Fundamental constants such as the strength of the electromagnetic force - the so-called fine-structure constant, or alpha - get their name from the fact that they are supposedly the same everywhere.
Constructed a control system of the electric stove with constant flow based on EPEC 3g microprocessor for the electric stove in the electromagnetic roll-casting system.