作者查詢 / fragmentwing
作者 fragmentwing 在 PTT [ Physics ] 看板的留言(推文), 共348則
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56F推: 其實不會差很多 你生活中不常見 但有很多高科技製品04/16 15:49
57F→: 都要在低壓下做 最近剛好上到可以和你說一下 關鍵字04/16 15:49
58F→: PVD 主要是因為加工時我們希望要加上去的材料能帶著04/16 15:49
59F→: 高能（動能）撞上被鍍物 那你知道空氣有所謂的平均04/16 15:49
60F→: 自由徑這問題 白話就是這顆粒子射出去平均走多遠會04/16 15:49
61F→: 撞到空氣中的其他粒子 撞一次能量就損失一次 其中還04/16 15:49
62F→: 有機率的問題 所以為了拉長平均自由徑 低壓是非常必04/16 15:49
63F→: 要的工作條件04/16 15:49
12F推: 有可能真的那麼複雜 不如說一樓講的搞不好還算簡化04/16 15:39
13F→: 光是那個「一瞬間」以材料系的角度來看就有很多東西04/16 15:39
14F→: 可以講了 搞不好要從價帶理論+費米能階的想法開始討04/16 15:39
15F→: 論04/16 15:39
31F推: 如果說光子真的能一顆一顆算 那它到底有沒有大小?04/07 11:35
5F推: 力要用公斤重吧 F=ma不是m啊03/31 09:13
19F推: 不是因為自然指數嗎03/18 12:22
20F推: 我稍微假想一個實驗 去他的波粒二相性03/18 12:37
21F→: 我假設03/18 12:37
22F→: 我假設我手上有一包光子要往前衝 介質是amorphous03/18 12:39
23F→: 原子核分佈跟那個布丁葡萄模型類似 只是這次葡萄是03/18 12:39
24F→: 整顆原子核03/18 12:39
25F→: 機率只有0%和100% 撞到原子核就判定這顆光子穿不過03/18 12:40
26F→: 去 反之一路通關到最後表示有穿過去03/18 12:40
27F→: 標準化下這包光子的能量合計為1 穿過介質後剩下x03/18 12:42
28F→: 接著你將這塊介質切成等寬的n層來看 一顆光子穿過每03/18 12:45
29F→: 一層的機率p1*p2*p3*……*pn=x03/18 12:45
30F→: 又p1=p2=…=pn03/18 12:46
31F→: 所以p*n=x03/18 12:46
32F推: 然後你會發現因為光子能量相等 損失多少光子便代表03/18 12:50
33F→: 損失多少能量 既然每單位損失的光子比例相等 對這包03/18 12:50
34F→: 光子而言 自然在每單位介質都會損失同樣比例的能量03/18 12:50
10F推: 不知道能不能推出往來兩界的方法03/27 02:39
4F推: 拿出微積分講義找公式吧03/21 12:05