After 10 minutes the surplus material is washed away and any remaining deposit examined with ultravioletlight.
10分钟后剩余的物质被冲洗掉，任何残留的沉淀物则会用紫外线进行检测。
2
The polygonal segments of the surface react to ultra-violetlight, mapping the position and intensity of solar rays.
其表面的多角形组成部分对紫外光产生反应，映射太阳光线的方位和强度。
3
They are only visible when they are bathed in ultra-violetlight and subjecting them to such constant bombardment would be not only impractical but harmful.