水會否吸收紫外光

1)No , UV is light energy which transform to other type energy which is no longer called UV again .
2)For pure water , UV can travel for half Kilometer before UV disappears . When UV meets the biological organisms , it will initail reactions so to kill the bacteria . If some ingoranic substances such silver powders , I donot know whether the UV is strong enough to initial any reactions . The detail you need to check by youself .
3)All depend the water nature , it will not be long as light travels very fast .
4)Put some UV absorbers in water .

第二個答案好好耶！幾好

水較易吸收電磁波中的長波如紅外光等,而不太能吸收紫外光
你的觀念有些問題,物體受電磁波如紅外光,可見光,紫外光等照射後即使會吸收.也只會吸收光的能量,光本身不能以光的形式被儲存