A Tour of Electromagnetic Spectrum
International Conference on Advanced Communication Systems, SV Engineering College for Women, Tirupati, 20.10.2017; One day Workshop on Electromagnetics and RF communication, Loyola ICAM College of Engineering and Technology 25.09. 2017
Electromagnetic radiation is broadly classified into Radio waves, Microwave radiation, Terahertz radiation, Infrared radiation, Visible radiation, Ultraviolet radiation, X-ray radiation, and Gamma radiation. We are surrounded by waves – radio waves transmitted by a nearby station, microwaves carrying cell phone calls and text messages, waves from our neighbor’s wifi and GPS units in the cars driving by. Radio waves fill the space around us to bring entertainment, communication, and key scientific information. Pulsars, Quasars that are 10 billion light years away have been discovered by radio waves. Microwaves carry thousands of phone channels to your telephone calls. Using infrared instruments on board, NASA Spitzers space telescope was able to detect nearly 2300 planet-forming discs, in the Orion nebula by sensing infrared, of the dust. Gamma rays have the shortest wavelengths and the highest energies. They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes.