Abstract: “The bodies of human beings and all animals are actuated by a complex network of noiseless, lossless transmission lines or axons controlled by a parallel processing computer or brain. So the body of human being is very much equivalent to a complex electronic and electrical circuit and this circuit can be controlled internally as well as externally effectively provided radio frequency power applied to it in a controlled and delicate manner. The question of hazard also arises from the unintentional exposure to radiation from high power radio, TV, radar and wireless transmitter. It is of concern to human that radio frequency heating can occur internally without much awareness because our heat sensors are on the skin. The effect becomes apparent at higher frequencies. Often question arises why transmission line effect usually noticeable at high frequency? What happens at low frequency? What are the definitions of high and low? What is near field and far field? How this effect creates nonlin”

Keywords: Electromagnetic radiation, SAR, Resonant frequency, Radiation doses, Power spectral density.