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Tag Archives: radio

11 incredible spy gadgets from CIA history


CIA MuseumA fly on the wall. CIA operatives may not use jetpacks or laser-powered watches, but they do have a few tricks up their sleeves. At the CIA Museum in Washington, DC, you can get a glimpse of the gadgets used in past spy missions. The agency has declassified 600 out of some 20,000 objects used …

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Making Sense of the Radio Spectrum

Radio spectrum refers to the part of the electromagnetic spectrum corresponding to radio frequencies – that is, frequencies lower than around 300 GHz (or, equivalently, wavelengths longer than about 1 mm).  

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