radiowave concepts and definition
Answers
Answer:
Definition: A radiowave an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication.
Explanation:
Radio waves are electromagnetic waves, which means that they are made up of an oscillating pattern of electric and magnetic fields that travels through space. Radio waves are certainly not the only type of electromagnetic wave, however. Light, microwaves, gamma rays, and many others are also electromagnetic waves, and together, they make up what we call the electromagnetic spectrum.
Even though light and radio waves may appear different to us, all electromagnetic waves are actually quite similar. The difference between a light wave and a radio wave is that these two waves have different wavelengths and frequencies. The frequency of a wave is how many times it repeats in a certain time interval (usually one second), and wave frequency is usually measured in units of Hertz (Hz). One Hertz corresponds to one wave cycle every second.
Light waves fall towards the middle of the spectrum, while radio waves are electromagnetic waves that have the much lower frequencies. Radio waves have frequencies that range from 3 kHz up to 300 GHz, while the frequency of visible light ranges from 400,000 to 700,000 GHz.
Just like all electromagnetic waves, radio waves can travel long distances through all kinds of media, or even through empty space. They also travel really fast, moving at the speed of light. Because of this, radio waves are critically important for all kinds of communication technologies, and not just important for keeping you entertained on a long drive in your car. Radio waves are used for everything from transmitting music and videos to communicating with astronauts in outer space.