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.
HrethelâFather of Higlac, Hathcyn, and Herbald; married his daughter to Edgetho; Beowulfâs grandfather; took Beowulf to live with him at age seven and loved him as a son; king of the Geats. WiglafâWexstanâs son; a former Swede; the only soldier who accompanies Beowulf into his last and fatal. battle with the dragon.