Radio uses radio waves to transmit information by modulating properties of electromagnetic waves like amplitude, frequency, and phase. Radio waves are a type of electromagnetic radiation with wavelengths longer than infrared light. A transmitter generates radio frequency alternating current to produce radio waves, while a radio receiver receives radio waves and converts the information to a usable form using an antenna. Frequency refers to the number of cycles per second in alternating current, and the electromagnetic spectrum includes all known frequencies and wavelengths of photons.

1. MD. OMAR FARUK
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2. Radio Wave
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3. Radio
 Radio is the technology of using radio waves to carry information, such as
sound, by systematically modulating properties of electromagnetic energy
waves transmitted through space, such as their amplitude, frequency, phase,
or pulse width.
 Radio wave.
 Transmitter.
 Radio receiver.
 Frequency.
 Electromagnetic spectrum.
 Wavelength.
 Electromagnetic radiation.
 Amplitude Modulation.
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4. Radio wave
 Radio waves are a type of electromagnetic radiation with wavelengths in
the electromagnetic spectrum longer than infrared light.
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5. Transmitter
 In electronics and telecommunications a transmitter or radio transmitter is
an electronic device which generates a radio frequency alternating current.
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6. Radio receiver
 In radio communications, a radio receiver is an electronic device that
receives radio waves and converts the information carried by them to a
usable form. It is used with an antenna.
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7. Frequency
 Frequency is the number of complete cycles per second in alternating current
direction.
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8. Electromagnetic spectrum
 The electromagnetic spectrum is the collective term for all known frequencies
and their linked wavelengths of the known photons.
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9. Wavelength
 A wavelength indicates the distance between two points in a wave of
electromagnetic energy that, in networking, encodes signals onto light to
transmit data.
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10. Electromagnetic radiation
 A kind of radiation including visible light, radio waves, gamma rays, and X-
rays, in which electric and magnetic fields vary simultaneously.
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11. Amplitude Modulation
 The modulation of a wave by varying its amplitude, used chiefly as a means
of radio broadcasting, in which an audio signal is combined with a carrier
wave.
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