As soon as a drop from the same liquid falls to the surface of the liquid, a crown emerges, which is followed by a Liquid Column shortly afterward. In order to measure the diameter of the short-lived crown and the height of the liquid column, we developed two incredible and useful devices for each one of that. After a series of experiments and discussion, we decided to adopt collision and oscillation to illuminate the phenomenon. And the details are in the reports. 液滴活泉：一種碰撞與振盪的交合，也是表面張力與黏滯力的拉鋸。碰撞的同時與 表面張力交柔展現皇冠；振盪的同時與黏滯力以圓形波動吞噬液滴。 望冠興嘆：激起的液體皇冠徑和隆起的液柱高猶如曇花一現，測量技術就簡單設備 而言是窮則思變的契機。 滴滴入扣：滴落小液滴如質點的碰撞，隨著液面的振盪，而終止於波心；滴落大液 滴如多個小液滴集體行動，如聖誕老公公灑落糖果般，爾後激盪擾動迴旋 不已。
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