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It is a section of the electromagnetic frequency scale, a lode of natural channels used by cellphones.

那不过是手机用到的一段段的电磁波段，一层层的自然频谱。

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That is because light is a form of electromagnetic radiation—in other words, a wave in which electric and magnetic fields continuously leapfrog each other.

那时因为光是以一种电磁辐射的形式存在的——换句话说，光就是一种波，在这种波里，电场与磁场不断地相互进行着交替作用。

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Microwaves are a form of electromagnetic radiation similar to, but shorter than,radio waves.

VOA: special.2010.09.01

Students have a lot of trouble with the concepts because there is not much intuition about electromagnetic phenomenon.

学生们对于理解概念,觉得很困难,因为对于电磁学现象,只有很少能凭直觉理解的。

麻省理工公开课 - 媒体、教育、市场课程节选

For example, if we talk about photons, of course, we also just mean light, sometimes we refer to this as electromagnetic radiation, and there's several ways that you might be asked this in a problem or that you might be asked to answer.

举例来说，如果我们讨论光子，当然我们也叫做光，有时候我们看作是电磁辐射，而且这里有几种方式,你可能会在题目中被问到,或者被提问回答。

麻省理工公开课 - 化学原理课程节选

But Saxe's lab, using a machine called a transcranial magnetic stimulator, which applies an electromagnetic pulse to a targeted point in the brain, can temporarily disable the function in the TPJ and change what people think about someone else's actions.

FORBES: Magazine Article

Other research presented at the meeting suggests that most devices do not affect the implants in a significant way, even if they sometimes produce electromagnetic interference in a laboratory test.

CNN: Study: Headphones could interfere with pacemakers

Early research involved a colleague lying in a deckchair in the night-time open air with a piece of string to measure the meteors, while he observed electromagnetic signals on a cathode-ray tube in a nearby hut.

ECONOMIST: Bernard Lovell | The