Radio

Radio is the radiation (wireless transmission) of electromagnetic signals through the atmosphere or free space.

Description

The primary use of radio waves is to:

• Carry information using an electromagnetic phenomenon such as light or magnetism
• By systematically changing (modulating) some property of the phenomenon:
  • Amplitude
  • Frequency
  • Phase
  • Pulse width

Reception

When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor.

The information in the waves can be extracted and transformed into something resembling its original form.

See also

• Transmission (telecommunications)
• Wi-Fi
• Wireless

External Links

• Radio @ Wikipedia