《湖南中学物理》2014年第8期刊登有的笔者写的《为什么一天会涨两次潮》一文(下简称《为文》)。现在《为文》的基础上,再更加深入详细地解释一天为什么会涨两次潮这一常见的潮汐现象。在《为文》中曾指出,一天之所以会涨两次潮,简单一点讲是因为上图(与《为文》中插图相比,此图仅仅增加了C、D、E三点)中A点的引力加 “Hunan High School Physics” 2014 the eighth published some of the author wrote “why one day will rise twice tide” article (hereinafter referred to as “text”). Now based on the “text,” we will explain in more detail the common tidal phenomena of why one tide rises twice a day. In the article, I pointed out that the reason why the day rises two times in a wave, simply because the above figure (compared with illustrations in “Wen”, this figure only adds three points C, D and E) A point of gravity plus