Regions of the spectrum of the electromagnetic energy to reach the earth's surface by what?

electromagnetic energy most common item: xoxo_fallenangel_xoxo question ? Regions of the spectrum of the electromagnetic energy that the surface of the earth by these do not reachSpace telescopes are essential to the electromagnetic power that can not reach them to observe the surface of the earth. Regions of the spectrum of the electromagnetic energy to reach the surface of the earth does so by way of the so-known as? I can not find this in my book, and Google was not specific enough. ?

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