宇宙十大法則

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今天在學校資料是讀了目前最新的牛頓雜誌。
主題是“宇宙法則”。
這標題深深地吸引著我呢！
畢竟
這是宇宙嘛～
本人最愛的科學就是宇宙學。

看著這個世界怎麼發展…
那麼
話不多說。
大概跟你說下。

宇宙法則：
1. Kepler’s Law 開普勒定律

開普勒有三大定律。
第一定律：每一个行星都沿各自的椭圆轨道环绕太阳，而太阳则处在椭圆的一个焦点中。


 第二定律：在相等时间内，太阳和运动着的行星的连线所扫过的面积都是相等的。

 第三定律：各个行星绕太阳公转周期的平方和它们的椭圆轨道的半长轴的立方成正比。
就是這個公式：





2. 萬有引力定律：任意两个质点有通过连心线方向上的力相互吸引。该引力的大小与它们的质量乘积成正比，与它们距离的平方成反比。

  • F: 两个物体之间的引力
  • G: 万有引力常数
  • m1: 物体1的质量
  • m2: 物体2的质量
  • r: 两个物体之间的距离
常数G近似地等于6.67 × 10−11N m2 kg−2（牛顿米的平方每千克的平方）。


3. 動量守恆定律 Conservation of momentum
這個我就不用解釋啦！在不受外力的影響下，所有的物體都靜止不動或者以勻速向直前進。

4. 角動量守恆定律
這個有夠難解釋。物體的質量、旋轉速度和旋轉半徑三者的乘積保持不變。
也就是：m乘v乘r=constant.

5. 維恩位移定律Wien's displacement law
這是關於計算恆心表面的溫度的。

T ：物體的表面溫度
波長：物體發出的強度最大的光的波長

6. 能量守恆定律
需要解釋嗎？

7. “氵”增大原理
先給我找到第一個字的讀法。下次再修改。

8. 質量和能量等效應
愛因斯坦出了名的公式。有誰不知道？
能量=質量x光速的平方

9. 廣義相對論
遲點再找個美一點的圖片給你。
：解釋行星、恆星和整個宇宙現象和運動。

10. 哈勃定律
這定律也不難。

公式：星系的退行速度 = 哈勃常數 x 星系的距離
哈勃常數為72 ± 2.4 km s-1 Mpc-1
Mpc 是1百萬秒差距，也接近於326萬光年。

 10個定律裡，大部分不難。
除了第4個和第9個定律。





悲。




那麼。下次再分享！
--------------------------完。-----------------------

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