Changes

'''Radio''' is the branch of telecommunication that involves the transmission of [[electromagnetism|electromagnetic]] waves through space.

'''Radio''' is the branch of telecommunication that involves the transmission of [[electromagnetism|electromagnetic]] waves through space.

[[James Maxwell|James C. Maxwell]] developed the first radio-wave theory in 1864. He proved, mathematically at least, that if an [[electricity|electrical]] interruption is of short distance from the point at which it occurred, there would be passage of electrical current due to "some sort of waves that move at the speed of light", in which the electromagnetic energy would travel.

[[James Clerk Maxwell|James C. Maxwell]] developed the first radio-wave theory in 1864. He proved, mathematically at least, that if an [[electricity|electrical]] interruption is of short distance from the point at which it occurred, there would be passage of electrical current due to "some sort of waves that move at the speed of light", in which the electromagnetic energy would travel.

Radio signals are made up of two kinds of waves: “audio” (or sound) waves represent the sounds being sent to the audience and radio frequency waves travel with these sound waves to "carry" them to radios in homes and car, for example. All waves have three parts: a wavelength, an amplitude and a frequency. Each of these parts can be changed to carry information.

Radio signals are made up of two kinds of waves: “audio” (or sound) waves represent the sounds being sent to the audience and radio frequency waves travel with these sound waves to "carry" them to radios in homes and car, for example. All waves have three parts: a wavelength, an amplitude and a frequency. Each of these parts can be changed to carry information.