What is Kennelly-Heaviside layer?
The '''Kennelly–Heaviside layer''', also known as the '''E-region''', is part of the [[ionosphere]]. It is a region which is between 90&nbsp;km and 150&nbsp;km from the earth’s surface. It is named after the [[United States|America]]n [[engineer]] [[Arthur Edwin Kennelly]] and the [[British]] scientist [[Oliver Heaviside]]. These two scientists both predicted that this area existed, although it was not until some years later that it was proved. In the Kennelly-Heaviside layer neutral molecules are split into electrons and positively charged molecules. Radio waves can be bounced off this region so that long-distance radio messages can be sent over long distances around the curved surface of the earth. This was why [[Marconi]] had been able to send radio messages across the [[Atlantic Ocean|Atlantic]] in 1902, although it was not understood at the time. ==References== *The New Encyclopædia Britannica vol 4, 15th edition, 1986, {{ISBN|0-85229-434-4}} {{science-stub}} [[Category:Radio]] [[Category:Layers of Earth's atmosphere]]