Marconi was the first to develop and perfect this system, using the recently discovered "airwaves" that make up the electromagnetic spectrum.

马可尼是第一个开发和完善这一系统的人，他使用了最近发现的构成电磁谱仪的“空气波”。

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RADIOS work by using the electromagnetic spectrum to send information.

无线电通讯通过电磁频谱递信息。

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The filters cover various wavelengths over the ultraviolet, blueand red portions of the electromagnetic spectrum.

三个滤镜覆盖了电磁光谱的紫外、蓝和红部分的波长。

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So, our detection devices are a little bit limited here today, we're actually only going to be using our eyes, so that means that we need to stick with the visible range of the electromagnetic spectrum.

我们今天所有的探测仪器十分有限，实际上我们要用我们的眼睛来观测，这意味着我们只能看到,电磁谱中的可见光区间。

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Current Blu-ray lasers emit light in the blue part of the electromagnetic spectrum (about 405 nm wavelength).

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The Chinese concur that the contest for the electromagnetic spectrum to gain battlefield initiative is a crucial phase of warfare.

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New uses of the electromagnetic spectrum have given rise to everything from cell phones to phased array radars to satellite radio.

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