Because these different forms of electromagneticradiation - on this "simplistic" level - are fundamentally so similar, they are today commonly viewed as composing a single spectrum.
We radiate electromagneticradiation in the infrared part of the spectrum.
辐射出电磁辐射,我们身体是温暖的。
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To grasp the wonders of the cosmos, and understand its infinite variety and splendor, we must collect and analyze radiation emitted by phenomena throughout the entire electromagnetic (EM) spectrum.