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.
The Danes are again overjoyed, and Beowulfâs fame spreads across the kingdom. Beowulf departs after a sorrowful goodbye to Hrothgar, who has treated him like a son. He returns to Geatland, where he and his men are reunited with their king and queen, Hygelac and Hygd, to whom Beowulf recounts his adventures in Denmark.