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作者 eldar 在 PTT [ Physics ] 看板的留言(推文), 共285則

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[閒聊] 因果律

[ Physics ]39 留言, 推噓總分: +14

作者: saltlake - 發表於 2020/06/12 21:44(5年前)

6^F推eldar: 似乎大學研究所課程都沒有? 能想到相關的是光錐 time-like06/13 00:29

7^F→eldar: 教科書討論的系統不是處在平衡態或是力學可逆的過程06/13 00:33

26^F推eldar: 想請問樓上QFT裡具體的因果律關係式是?聽起來像是人為選解?06/13 13:43

[問題] 從量測聲場反推聲源

[ Physics ]32 留言, 推噓總分: +7

作者: saltlake - 發表於 2020/06/03 13:44(5年前)

24^F→eldar: 接收器有幾個？怎麼擺？不只一個就可以用時間差06/06 01:27

[問題] "距離"最短有哪些意義

[ Physics ]9 留言, 推噓總分: +6

作者: saltlake - 發表於 2020/05/21 08:52(5年前)

8^F→eldar: 看不懂...是問兩點間最短距離的路徑嗎? 什麼勢能最小?05/23 21:28

[閒聊] 稍微討論一下地平理論

[ Physics ]33 留言, 推噓總分: +4

作者: kennings - 發表於 2020/03/29 01:30(5年前)

9^F推eldar: 為何在'高速'移動中拍的照片不能算數？03/30 00:59

27^F推eldar: 關於移動中拍照片：1)快門速度通常1~100毫秒左右03/30 23:05

28^F→eldar: 月繞地速度約1km/s，地繞日速度約30km/s 太空站繞地約8km/s03/30 23:07

29^F→eldar: 前兩者的照片有不圓嗎？還是覺得視角變化太快會扭曲？03/30 23:11

30^F→eldar: 衛星和太空站照片是好證據，雲高10km對地球半徑微不足道03/30 23:13

[閒聊] 業餘人士的「論文」

[ Physics ]74 留言, 推噓總分: +24

作者: ashyr - 發表於 2020/03/07 00:10(6年前)

6^F→eldar: 可以把論文摘要po在這裡給大家先看看03/08 12:01

[問題] 雷射射程

[ Physics ]4 留言, 推噓總分: -1

作者: sam122094 - 發表於 2018/09/19 09:33(7年前)

4^F→eldar: 做簡報用紅光雷射筆就好，綠藍光傷眼09/21 23:08

[新聞] 科幻引擎 EmDrive 真能讓人類 41 天上火星？德團隊測試結論

[ Physics ]38 留言, 推噓總分: +12

作者: leptoneta - 發表於 2018/05/24 20:29(7年前)

9^F→eldar: 地球磁場可用來推進，那星際磁場呢05/25 23:41

[問題] 人造核融合為何要採用氘氚來當燃料呢?

[ Physics ]12 留言, 推噓總分: +5

作者: t20056 - 發表於 2018/01/12 19:37(8年前)

2^F推eldar: 用氫的話氦的中子要那裡來呢？01/12 23:01

7^F→eldar: 可以查查proton-proton chain01/14 02:06

Re: [問題]未來想讀天文物理想請教大家意見

[ Physics ]61 留言, 推噓總分: +22

作者: ccfux - 發表於 2017/08/26 10:37(8年前)

59^F推eldar: 推經驗分享09/20 00:17

Re: [問題] 計算物理和量子電腦/量子計算

[ Physics ]135 留言, 推噓總分: +46

作者: pipidog - 發表於 2017/08/08 04:52(8年前)

56^F推eldar: 優文推08/10 01:34

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