Radio waves are able to wirelessly carry important information almost instantaneously and, aside from just transmitting audio and television signals, they make cell phones, global positioning systems and space communication possible. Radio wave technology has allowed for significantly faster and easier communication and navigation.Know More
Radio waves are electromagnetic radiation waves that have wavelengths that are longer than infrared light. Wavelengths of radio waves range from several millimeters long to many miles long. Because radio waves are a type of electromagnetic radiation, they travel and can carry information at the speed of light.
A simple radio uses an antenna and a tuner to pick up the correct radio waves. Different stations have different radio frequencies that they give off. The radio inside a stereo system or car picks up the radio wave by tuning the antenna to receive only the desired frequency. When the correct radio frequency is received, the radio converts the waves into sound using speakers.
Radio technology and research led the way for the invention of the cell phone, the GPS and many other communication devices. Cell phones and global positioning units send information to satellites using radio waves. The satellites either receive the waves and transmit new ones with the same information back to Earth, or they simply reflect the radio waves back onto the surface of the Earth.Learn more about Optics & Waves
Radio waves range from 300 gigahertz (GHz), or a wavelength of 1 millimeter, to 3 kilohertz (kHz), which corresponds to a wavelength of 100 kilometers. Radio waves are the lowest frequency within the electromagnetic spectrum. The wavelength is the distance from the peak of one wave to the next.Full Answer >
Radio waves are detected using electrical circuits that receive these electromagnetic signals in an antenna, and then the radio frequencies are modulated through capacitors before emerging as sound in a speaker. Radio waves are normally less than a kilohertz long up to 20 gigahertz. Since humans cannot hear these frequencies, radio signals are often translated into sounds by electrical devices.Full Answer >
Radio waves are used to transmit signals through the air, with the main benefit being that the only equipment necessary is a transmitter and receiver. There are no cables to string or holes to dig as the waves are simply transmitted from one place to another.Full Answer >
Radio waves travel at a velocity that is equal to the speed of light traveling in a vacuum, which is 186,282 miles per second. Top speed is only possible in empty space; passing through transparent liquids and solids like crystals cause waves to bend, which slows down their speed.Full Answer >