Re: [閒聊] 大家覺得最屌的物理定律/定理/公式是哪個?
※ 引述《coolbetter33 (香港3345678)》之銘言:
: 先講我的 ! 最近讀電磁學讀到 Maxwell's equations 覺得蠻酷的
: 3M's of Maxwell's equations
: Micro-form Macro-form Meaning
: → →
: ▽‧D = ρ ∮D‧ds= Q Gauss's Law
: → →
: ▽‧B = 0 ∮B‧ds= 0 Twin's Law
: → →
: → → δD → δD
: ▽╳H = J+ ── ∮H‧dl= I+ ∮── ds Ampere's Law
: δt δt
: →
: → δB → dΦ
: ▽╳E = -── ∮E‧dl= - ── Faraday's Law
: δt dt
: 馬大師真是奇才.用 ▽╳H = J 與 連續方程矛盾的方法.導出
: Ampere's Law 的Micro-form.紙上談兵也出師了.
: 大家有目前看過認為不錯的東西可以分享的嗎 ?
其實最左邊那四條微分形式不是Maxwell做的,
是和Maxwell同時期的Heaviside寫的
他是個電報技師,是在工程界的期刊上發表這四條方程式的
因為Maxwell原本的論文很繁瑣,式子也很難看
(他當時真的是把電磁波當一般的介質波在推導,
所以有一堆「乙太的彈力」之類的東西,還拿彈簧和軸承等東西當模型)
然後啊,Maxwell equations這樣寫就太遜了
是物理系就要寫成張量式:
μν 4π ν
δ F = ----- j
μ c
可以拿去嗆電機系的人,科科
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 99.30.135.231
推
05/30 04:04, , 1F
05/30 04:04, 1F
→
05/30 04:52, , 2F
05/30 04:52, 2F
→
05/30 04:53, , 3F
05/30 04:53, 3F
推
05/30 05:02, , 4F
05/30 05:02, 4F
推
05/30 07:08, , 5F
05/30 07:08, 5F
→
05/30 07:09, , 6F
05/30 07:09, 6F
推
05/30 09:55, , 7F
05/30 09:55, 7F
推
05/30 10:34, , 8F
05/30 10:34, 8F
推
05/30 11:36, , 9F
05/30 11:36, 9F
推
05/30 11:44, , 10F
05/30 11:44, 10F
推
05/30 12:17, , 11F
05/30 12:17, 11F
推
05/30 12:21, , 12F
05/30 12:21, 12F
→
05/30 14:19, , 13F
05/30 14:19, 13F
→
05/30 14:24, , 14F
05/30 14:24, 14F
推
05/30 15:37, , 15F
05/30 15:37, 15F
推
05/30 17:11, , 16F
05/30 17:11, 16F
推
05/30 19:25, , 17F
05/30 19:25, 17F
推
05/30 21:07, , 18F
05/30 21:07, 18F
推
05/30 23:54, , 19F
05/30 23:54, 19F
推
05/31 01:03, , 20F
05/31 01:03, 20F
推
05/31 11:44, , 21F
05/31 11:44, 21F
→
05/31 11:45, , 22F
05/31 11:45, 22F
→
05/31 11:46, , 23F
05/31 11:46, 23F
推
05/31 11:48, , 24F
05/31 11:48, 24F
推
05/31 12:46, , 25F
05/31 12:46, 25F
推
05/31 12:55, , 26F
05/31 12:55, 26F
→
05/31 13:15, , 27F
05/31 13:15, 27F
→
05/31 13:16, , 28F
05/31 13:16, 28F
→
05/31 13:19, , 29F
05/31 13:19, 29F
→
05/31 13:30, , 30F
05/31 13:30, 30F
→
05/31 13:32, , 31F
05/31 13:32, 31F
推
05/31 15:36, , 32F
05/31 15:36, 32F
噓
05/31 21:45, , 33F
05/31 21:45, 33F
→
05/31 23:00, , 34F
05/31 23:00, 34F
推
06/01 10:04, , 35F
06/01 10:04, 35F
→
06/01 10:05, , 36F
06/01 10:05, 36F
推
06/01 10:14, , 37F
06/01 10:14, 37F
→
06/01 13:41, , 38F
06/01 13:41, 38F
→
06/01 13:53, , 39F
06/01 13:53, 39F
→
06/01 13:56, , 40F
06/01 13:56, 40F
→
06/01 13:56, , 41F
06/01 13:56, 41F
→
08/13 16:18, , 42F
08/13 16:18, 42F
→
09/17 14:17, , 43F
09/17 14:17, 43F
討論串 (同標題文章)