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
One of the disadvantages of radio waves is that they cannot transmit a lot of data simultaneously because they're low frequency. In addition, continued exposure to large amounts of radio waves can cause health disorders like leukemia and cancer. Despite these setbacks, technicians have effectively achieved enormous breakthroughs. For example, astronauts use radio waves to transmit information from space to Earth and vice versa.Full Answer >
Some properties of radio waves, which are a type of electromagnetic radiation, are that they have the longest wavelengths and the shortest frequencies on the electromagnetic spectrum, The wavelengths of radio waves are greater than 4 inches. Radio waves also can be subdivided into different groups that include long- and short-radio waves.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 >
Most metallic objects, like aluminum foil, iron or zinc objects, anything with copper or iron oxide paint, steel pots, and iron skillets can block radio waves. However, depending on the frequency of different radio wavelengths, some wavelengths may be powerful enough to surpass certain metals.Full Answer >