Electromagnetic Spectrum
Resources
- frequency allocation
- United States
- National Telecommunications and Information Administration
- North American Railroad Radio Frequencies. Jim Kalrath. Wisconsin Historic Rail Connection
- United States
- extremely low frequency (ELF)
- ELF Comms Facility Coming Up [in India]. Prasun K. Sengupta. Trishul (2012).
- ELF transmitters on Google Earth
- Clam Lake, Wisconsin, USA (ELF-WTF)
- Republic, Michigan, USA (ELF-MTF)
- Kola Peninsula, Russia (Зевс or Zevs or Zeus depending on the source)
- Loresco. Deep AC grounding systems for the Navy's ELF system.
- Reception of ELF Signals at Antipodal Distances. Antony C. Fraser-Smith and Peter R. Bannister. Radio Science. Vol. 33 No. 1 (1998): 83–88. Measurements of 82-Hz radio signals from a Russian ELF transmitter located on the Kola Peninsula are described.
- low frequency
- Radio Waves Below 22 kHz. Renato Romero.
- Stanford University VLF Group
- Stephen P. McGreevy
- auroralchorus.com. Natural ELF-VLF radio phenomena, the music of the magnetosphere, and space weather.
- naturalvlfradio.com. On the art of natural VLF field recording.
- Electric Enigma: The VLF Recordings of Stephen P. McGreevy. Internet Archive.
- high frequency
- Duga, the Steel Giant Near Chernobyl (a.k.a. The Russian Woodpecker). English Russia (2008).
- Major Edwin Howard Armstrong: The Inventor of FM. Chris Tsakis. WFMU (1996).
- microwaves
- Cellular Telephones and Cancer: How Should Science Respond? Robert L. Park. Journal of the National Cancer Institute. Vol. 93 No. 3 (2001): 166–167.
- Radar Science and Engineering Section. NASA/JPL
- Module 19, The Technician's Handbook. Naval Electrical Engineering Training Series (NEETS). United States Navy Electricity and Electronics Training Series (1998).
- Microwaves Damage Food. Dr. Karl Kruszelnicki, Great Moments in Science, Australian Broadcasting Corporation (2006).
- Radar Meteorology: online remote sensing guide. Department of Atmospheric Sciences (DAS) at the University of Illinois at Urbana-Champaign (1997).
- Microwave Oven. Percey Spencer. US Patent 2,495,429 (1945).
- millimeter waves
- Farran Technologies. Manufacturers of millimeter wave technologies.
- The work of Jagadis Chandra Bose: 100 years of mm-wave research. D.T. Emerson. National Radio Astronomy Observatory (1998).
- Millimeter Wave Technology Group. Rutherford-Appleton Laboratory.
- non ionizing radiation
- rabbit ears
- collectors with lots of nice photos
- inventors
- Battle of the 'Rabbit Ears' Heirs on Long Island, N. R. Kleinfield, New York Times, 27 November 1991. Marvin Middlemark is often called the "inventor" of the rabbit ears antenna. While this claim is doubtful, he probably made more money than any one person on their sale. His All Channel Products Corporation in Queens, New York under the Rembrandt brand name was the leading manufacturer of indoor TV antennas in the mid-1960s.
- Karsten Solheim, 88, Is Dead; Creator of the Ping Golf Club, Clifton Brown, New York Times, 18 February 2000. Kartsten Solheim joined General Electric as a mechanical engineer in 1953 and helped design the antenna on their first portable television. This has resulted in him accidentally being called the "inventor" of the rabbit ears by some. Solheim is probably best known as the founder of Karsten Manufacturing and the creator of Ping golf clubs.
- patents
- Design for an adjustable antenna. Ralph Leonard. US Patent D152990. (filed 1948, awarded 1949). The oldest patent I could find with the familiar rabbit ears look.
- Combination lamp and television antenna. Theophile Stiffel. US Patent 2583066. (filed 1949, awarded 1952). Rabbit ears hidden in a floor lamp. A brilliant design that never caught on.
- Television antenna. Milton Spirit and Jerome Goldman. US Patent 2608657. (filed 1950, awarded 1952)
- Television antenna. Douglas Carpenter. US Patent 2834015. (filed 1954, awarded 1958)
- Television antenna. Marvin Middlemark. US Patent D175628. (filed 1955, awarded 1955). This is the oldest design patent I could find with the Middlemark name on it. (See inventors above.)
- radio astronomy
- Arecibo Observatory
- Big Ear Radio Observatory
- Deep Space Network
- National Radio Astronomy Observatory (NRAO)
- Space Audio
- Space Audio, YouTube
- space-audio.org, Jeremy Faden
- Van Allen Probes EMFISIS Waves Audio Clips, University of Iowa
- Wilkinson Microwave Anisotropy Probe (WMAP)
- Very Large Array (VLA)
- search for extraterrestrial intelligence (SETI)
- SETI Institute
- SETI@Home, University of California, Berkeley
- Interstellar Radio Messages, Institute of Radio-engineering and Electronics, Russian Academy of Sciences
- Searching for Interstellar Communication. Guiseppe Cocconi and Philip Morrison. Nature. Vol. 184 (1959): 844–846.
- Scanned copy at the Columbus Optical SETI Observatory
- Video on demand
- Brady Haran
- Antenna. Sixty Symbols. YouTube (2009). Bet you never knew antennas (or aerials) could be so interesting!
- Physical Science Study Committee (PSSC)
- Electromagnetic Waves 1961 PSSC George Wolga, Massachusetts Institute of Technology. Jeff Quitney. YouTube. George J. Wolga shows why we believe in the unity of the electromagnetic radiation spectrum. He performs experiments which show that the radiation arises from accelerated charges and consists of transverse waves that can be polarized.
- Tom Scott and Matt Gray
- How The Arecibo Telescope Could Help Save The World. Tom Scott. YouTube (2017). The radio telescope at the Arecibo Observatory in Puerto Rico can do something that most radio telescopes can't: it can transmit. And that's useful for something other than sending messages to the stars: it might just help save the world one day.
- Behind the Scenes at the Arecibo Radio Telescope. Matt and Tom YouTube (2017). We visited the Arecibo Radio Telescope for today's video on Tom's channel. Matt was wearing a GoPro on his helmet throughout the visit, so here's what he could see!
- Brady Haran
