Radio  

From The Art and Popular Culture Encyclopedia

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Radio is the wireless transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 30 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.

See also

Applications

• Amateur radio
• Citizens' band radio
• Marine and mobile radio telephony
• Marine VHF radio
• Radio astronomy
• Radio broadcasting
  • AM broadcasting
  • FM broadcasting
  • Campus radio
  • Old-time radio
  • Pirate radio
  • Radio programming
    • Radio documentary
• Radio navigation
  • Radio direction finder
  • Direction finding
• Wireless energy transfer

Radio science

• Carrier current
• Hertz
• Types of radio emissions
  • Amplitude modulation
  • Frequency modulation
  • Longwave / Medium wave / Shortwave
• Radio propagation and ionosphere

Radio technologies

• Batteryless radio
• Digital radio
  • Satellite radio
• Radio software
• Receiver (radio)
  • Crystal radio
  • Superheterodyne receiver
  • Transistor radio
• Software-defined radio
• Tuner (radio)

Alternatives

• Cable FM
• Free-space optical communication (FSO)
• Internet radio
• Power line communication

Other

• Antique radio
• Bandstacked
• History of radio
  • Years in radio
  • Timeline of radio