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第284章 蒙恬:要是长城摆满望远镜?(2 / 2)

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“骑马走那么远?那你是够勇的呀……”

赵龙听了一阵意外。

“呵呵,习惯了……”

“哎,省钱是吧?都怪咱们穷惯了……”

赵龙听了叹了口气,“放心,等国家扶贫任务推进的更好一点了,咱们就不缺这个坐火车的钱了。”

“啊,对对对……”

“那不如我教给你方法吧?我就算给你做一两个那也没用啊,毕竟你们牧场那么大!”

赵龙说道。

“要是教给方法那就更好了!”

蒙恬听了更是一阵激动。

“并不难,来我给你画一个……”

赵龙说着把自己的方案往旁边一推,然后拿过几张纸来铺上,一手拿着炭笔,一手拿着木尺,一边教授,一边对蒙恬说道,“其实这望远镜,简单来说,就是四个镜片。要是复杂一点的观察镜,那就有六个或者八个镜片。玻璃现在你会造吧?”

“对,玻璃现在会了……”

蒙恬毕竟是跟着耳濡目染那么久,对于制造玻璃的流程还是了解的。

“那就好。”

赵龙说道,“过于精细的咱们也用不着制造出来。那就用简单的方法,又省事又省钱。这些镜片,你制造出来之后,关键在于打磨的角度。

先把玻璃弄的厚一点,圆一点,要是可以的话就先弄一个椭圆的圆盘,那样最省事。

之后你就用铁纱布,不行的话直接用比较粗一点的沙子来磨也行。

等到这些玻璃磨成大概的样子之后,你就可以组装了,其实组装也特别的简单。你记住按照这样的顺序调整好比例,那就可以了。”

赵龙说着,已经画了一个大概,“怎么样,不难吧?”

“啧啧,先生不愧是先生……”

蒙恬听了,看了看那些草图,忍不住感叹道,“未曾想到,那如此神奇之物,制作方法也并不难。”

“难是不难,关键在于里面的构造到底懂不懂,还有就是挺耗费时间的。”

赵龙笑着说道,“咱一般的人要么不想耗费那么多时间,要么不想钻研比较麻烦的技巧,为了偷眼前的懒,所以很多时候都是应付和糊弄。

这人嘛,应付和糊弄一开始是对别人,但要是一直这么做,那就是应付糊弄自己了。”

“先生此言有理。”

“对了先生……”

蒙恬又忙问道,“此物到底能看多远?”

他心说这个问题可得问明白,要是这东西能看得不太远的话,那对自己行军和观测匈奴人来说作用也未必很大。

当然肯定是比眼睛要强!

如果观测距离能比较远,那可就太好了!

“这个啊……要是做的更好一点的,那看个五千米是有可能的,但是那个咱一般可能达不到……”

赵龙笑着说道,“不过你要是留守在自己的观察哨那里用,倒是可以做的,大一点,长一点,只要天气合适,焦距调好,哪怕看的不特别清晰,但是距离不是问题!二十千米之外都能看得到!

这要是你随身携带的话,我感觉搞个三千米四千米的就已经很不错了……

不过这也得看观察的人眼力好不好,如果本身视力好的,那看的就更远更清晰,本身视力不行的,你用好的软件给他看,他也得折扣不少效果!”

“是如此啊……”

蒙恬一愣,随即试探问道,“先生,什么是千米?”

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