Electromagnetism, the science that deals with the phenomena that result from the relationship between electricity and magnetism. The term is also used to refer to the electromagnetic phenomena themselves.
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Electronics, the branch of science and technology concerned with the nature, uses, and manufacture of devices in which electrons flow through a gas, vacuum, or semiconductor. Learn all about electronics.
For centuries, curious observers have probed the heavens with the aid of telescopes. Today, both amateur and professional scopes magnify images in a variety of ways.