abstract:Uraš or Urash, in Sumerian mythology is a goddess of earth, and one of the consorts of the sky god Anu. She is the mother of the goddess Ninsun and a grandmother of hero Gilgamesh.
The conceptofradiationeffects of detention was explained and photonproduceprocessof low-pressure mercury was urasanalyzed, from the perspestive of atomic energy leveltransition.