Major objective of this lecture is to present on Ultraviolet Radiation. Ultraviolet Radiation(UV) is simply one form of energy coming from the sun. Even though you may have only just started hearing about UV and the effects it has on you, it is nothing new. In humans, excessive exposure to all bands of UV radiation can result in chronic harmful effects on the skin, eye, and immune system. Acute radiation syndrome are: Vomiting; Diarrhea; Reduction in the number of blood cells; Bleeding; Hair loss; Temporary sterility in males; Lens opacity and Others.