Radios have been used for a very long time as a means of communication. The process of how this communication gets to its destination can be confusing sometimes but also easy.
First, a radio station picks something that needs to be transmitted and they convert the sound waves into electromagnetic waves. The reason behind this is because sound waves cannot travel through a vacuum, whereas electromagnetic waves can so they convert them into these electromagnetic waves so they can travel great distances through any kind of matter or atmosphere is little disruption. Once the wave is sent it is then picked up by a radio and the radio decodes these electromagnetic waves and then uses a speaker to convert them back into sound waves and output the sound for our ears to hear. The sounds that we hear depend on the changes that were made to a waves frequency and amplitude. Which also brings about the AM and FM radio modulations.
Sources:
"NRAO: National Radio Astronomy Observatory." How Radio Communication Works. National Science Foundation, n.d. Web. 18 Feb. 2013.
No comments:
Post a Comment