Over-exposure to certain types of electromagnetic radiation can be harmful. The higher the frequency of the radiation, the more damage it is likely to cause to the body:1  microwaves cause internal heating of body tissues. 2  infrared radiation is felt as heat and causes skin burns.ver-exposure to certain types of electromagnetic radiation can be harmful. The higher the frequency of the radiation, the more damage it is likely to cause to the body:
Hygelac is also mentioned in Beowulf, a long poem in Old English (the language spoken in early medieval England). The poet describes how Hygelac took on the combined forces of Franks, Frisians and âHetwareâ (the âAtt-oariiâ of the Liber Historiae Francorum) and that he died in Frisia. ealdor dugoÃ°e.
Hrothgar - King of the Danes. Hrothgar maintains a highly powerful and prosperous kingdom until Grendel begins terrorizing the area. In Beowulf, Hrothgar is an exemplary model of kingship, but in Grendel he is more flawed and human. Grendel often describes his war with the humans as a personal battle between Hrothgar and himself. The Shaper - A harpist and storyteller in Hrothgarâs court.