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第492章 明道华觜崖(4)

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这个小实验一做,旁听的都明白了韩冈的意思。同样一柄折扇,都是张开的,但迎风面不同,下落的速度也不一样。

只听韩冈道:“堵门石比起秤砣要大得多,受得风阻也大得多。当真两物分开来后,只要能同时放下。敢问学士,这结果会怎样?”

杨绘瞠目结舌,按韩冈的说法,甚至可能秤砣比石块落得还快!

赵顼也吃惊起来,原本从直觉上,他觉得越重的东西下落越快,后来从韩冈这来知道应是一样快,这还勉强能接受。可现在好了,反而是轻的下落得更快!

韩冈这是明着欺负杨绘。他说的其实是刻意忽略石头和秤砣本身的质量差距,而将问题不知不觉的转移到单纯的迎风面积和阻力的问题上。

如果杨绘能想透其中的破绽,韩冈可以趁机将质量和力之间关系的定义举出来,加上前面的实验和理论,牛顿力学第二定律就可正式在公开场合亮相。可惜杨绘却没有,沉湎于诗词歌赋和经义文章,在科学方面的思考能力还是不够水准,很容易就被弄糊涂了。

韩冈也没有失望。一次灌输的太多,反而会出问题。简简单单的一个实验,加上一条完美的思辨论述,已经足以将杨绘等反对者打得溃不成军。事理皆在眼前,容不得他嘴硬。

至于之后的事,可以慢慢来。总有聪明人能想透,到时再反驳,便可以将格物物理上的争论一的炒热!

这才是正道,比起去横渠书院单纯扯着勉强糅合起来的理论,而被吕大临问得近乎张口结舌的情况,接受了教训的韩冈,终于找到正确的路子。

现在韩冈要趁热打铁,将风阻的存在和影响,用事实再次确认:“正如人骑马,骑的越快,迎面而来的风就越大。这是就要低头弯腰,缩小迎风面,以减小阻力。”

“林管勾,还请再找两个一样的秤砣来。”

林深河前面押错了宝,现在哪敢再违抗韩冈,不移时,便让人找了两个一模一样的秤砣来。

韩冈没动手,只是让人拿出一块丝巾,将四个角用细绳扎在其中一个秤砣顶部的孔洞上,绑成了降落伞的形状。

在天子的目光中,韩冈将两个秤砣同时丢下去。其中一个扑通一声落水。另一个则是靠绸巾兜着风,慢悠悠的落下去了。

等着天子的视线从降落伞上转回来,韩冈道:“绑了绸巾的秤砣比起另一个秤砣还要重一点,但就是落得慢。同样的实验,千万人都可以做,就是学士亦可以私下里做,都能得到同样的结论:落物的速度与轻重无关,只与阻力大小有关。”

他说话间不忘带一下杨绘,提醒人们,翰林学士杨元素的赌帐尚没有还。

“不知此有何用。”杨绘冷然问着,他本来打定主意不开口了,防着继续丢脸,但韩冈挑衅似的带上他一句。他却不能继续做哑巴了:“就算知道是落物速度与轻重无关,只与阻力多少有关。敢问此一条又有何用?”

在没有亚里士多德的两千年权威压制,这个实验的意义,当然不如伽利略如同惊雷一般劈开中世纪的迷雾那般振聋发聩。但只要引起天子的兴趣,就已经够了。一旦赵顼对此有了兴趣,而要把格物致知的理论塞进经义局的新编教材中,便容易了许多。

毕竟韩冈还有三棱镜分光实验,帕斯卡的木桶实验,甚至用来表现大气压力的虹吸管等一系列实验没有出手呢。初中物理上,看似简单的一系列实验,却是多少大智慧者才智的结晶,韩冈若是拿出来,嘴硬如杨绘的会问一句有什么用,但更多人却会去思考其中的原理。

不过现在杨绘就在眼前,还是要应付他一下。

韩冈的回答并不是语言,而是动作。似是无奈的摇了摇头,看杨绘的眼光也是居高临下,如同大人看着赌气不肯服输的小孩子。叹了一口气:“既然学士如此说,那也就罢了,权当无此赌注好了。”

“你!”

杨绘一下气得脸皮发紫,眼睛都红了。韩冈若跟他争辩,总有破绽出来。但韩冈竟然不肯辩论!

韩冈才不会跟杨绘斗嘴。姿态越高,杨绘就越丢脸。文人之间的争辩,尤其是这等已经是一方赌上一口气的意气之争,就像是后世论坛上争吵,根本不可能说服对方。只要设法能逼着对方失态,那就是赢了。

杨绘耍了赖皮,这对韩冈更是好事,真的在天子面前斗起气来,还会被咬上一个尊卑不分的罪名。而现在,丢尽脸的只有杨绘一个。

赵顼对杨绘的态度也有些不满,好歹也是翰林学士,怎么能这般无赖?可也因为杨绘是翰林学士,朝廷重臣的脸面要给他留着。

“今日之事已了,朕先行回宫。今次的琼林宴,也别拖得太久!”说着便自顾自的下去了。

恭送过天子圣驾,韩冈看看杨绘,又看看曾布。天子既然让琼林宴不要拖得太久,当然也就得听着,应该算是告一段落了。天子提前结束琼林宴,可见是不想让杨绘继续受气。但他离开时并不拉着杨绘,更可知并没有太过照顾杨绘的想法。

看着脸色一阵发青,一幅快要吐血模样的杨元素。韩冈知道,他今天的胜利乃是实实在在。想来张载,离着经义局已经不远了。

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