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.Continue Reading
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 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 >
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 make up the part of the electromagnetic spectrum with the longest wavelengths. Radio waves are used in radio and television broadcasts, satellite transmissions and cell phone signals. Astronomical objects give off radio waves which can be detected by radio telescopes.Full Answer >
The speed of radio waves is approximately 185 miles per second, which is also the speed of light. The reason that radio waves travel at the speed of light is that they are a type of electromagnetic radiation. Other forms of electromagnetic radiation are X-rays and light.Full Answer >