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 is the King of the Danes. - Heorot, Hrothgar's hall, is under attack by a monster named Grendel. - Beowulf, a famous warrior, belongs to a tribe called the Geats. - Beowulf defeats Grendel and then defeats Grendel's mother. - Beowulf becomes King of the Geats and slays a dragon.