[問題] 如何分辨左右
有一個朋友問我這個問題
感覺還蠻有趣的, 一時間我也想不太到答案
問題是:
假設現在我們能夠和與我們具有相同物理知識的外星人通訊
該怎麼跟外星人說左邊在哪一邊呢?
如果不能傳送影像的話
本來是想找到上方與前方向量後求外積
它的方向就是左邊
但是突然想到, x 座標左邊為正還是負根本還沒定義啊
所以外積的方向和計算方式也都未定義...
不知道大家有沒有什麼想法可以解決這個問題~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 59.124.99.126
※ 編輯: Ebergies 來自: 59.124.99.126 (04/08 11:20)
→
04/08 11:24, , 1F
04/08 11:24, 1F
→
04/08 11:33, , 2F
04/08 11:33, 2F
→
04/08 11:33, , 3F
04/08 11:33, 3F
推
04/08 11:39, , 4F
04/08 11:39, 4F
推
04/08 11:39, , 5F
04/08 11:39, 5F
→
04/08 11:39, , 6F
04/08 11:39, 6F
→
04/08 11:59, , 7F
04/08 11:59, 7F
→
04/08 13:19, , 8F
04/08 13:19, 8F
推
04/08 13:37, , 9F
04/08 13:37, 9F
→
04/08 13:37, , 10F
04/08 13:37, 10F
→
04/08 14:34, , 11F
04/08 14:34, 11F
→
04/08 14:34, , 12F
04/08 14:34, 12F
→
04/08 14:35, , 13F
04/08 14:35, 13F
→
04/08 15:29, , 14F
04/08 15:29, 14F
推
04/08 15:55, , 15F
04/08 15:55, 15F
→
04/08 15:57, , 16F
04/08 15:57, 16F
推
04/08 16:03, , 17F
04/08 16:03, 17F
→
04/08 16:28, , 18F
04/08 16:28, 18F
→
04/08 16:28, , 19F
04/08 16:28, 19F
推
04/08 17:04, , 20F
04/08 17:04, 20F
→
04/08 17:15, , 21F
04/08 17:15, 21F
→
04/08 17:17, , 22F
04/08 17:17, 22F
→
04/08 17:32, , 23F
04/08 17:32, 23F
→
04/08 17:35, , 24F
04/08 17:35, 24F
→
04/08 17:35, , 25F
04/08 17:35, 25F
→
04/08 17:36, , 26F
04/08 17:36, 26F
→
04/08 17:36, , 27F
04/08 17:36, 27F
→
04/08 17:37, , 28F
04/08 17:37, 28F
→
04/08 17:38, , 29F
04/08 17:38, 29F
→
04/08 17:46, , 30F
04/08 17:46, 30F
→
04/08 17:47, , 31F
04/08 17:47, 31F
推
04/08 22:14, , 32F
04/08 22:14, 32F
推
04/08 23:49, , 33F
04/08 23:49, 33F
→
04/08 23:50, , 34F
04/08 23:50, 34F
→
04/08 23:51, , 35F
04/08 23:51, 35F
推
04/08 23:51, , 36F
04/08 23:51, 36F
→
04/08 23:51, , 37F
04/08 23:51, 37F
→
04/08 23:52, , 38F
04/08 23:52, 38F
推
04/08 23:57, , 39F
04/08 23:57, 39F
推
04/08 23:59, , 40F
04/08 23:59, 40F
推
04/09 00:00, , 41F
04/09 00:00, 41F
→
04/09 00:01, , 42F
04/09 00:01, 42F
推
04/09 00:03, , 43F
04/09 00:03, 43F
推
04/09 00:04, , 44F
04/09 00:04, 44F
推
04/09 00:08, , 45F
04/09 00:08, 45F
→
04/09 00:14, , 46F
04/09 00:14, 46F
→
04/09 00:15, , 47F
04/09 00:15, 47F
→
04/09 00:16, , 48F
04/09 00:16, 48F
→
04/09 00:16, , 49F
04/09 00:16, 49F
→
04/09 00:17, , 50F
04/09 00:17, 50F
→
04/09 00:17, , 51F
04/09 00:17, 51F
→
04/09 00:19, , 52F
04/09 00:19, 52F
→
04/09 00:20, , 53F
04/09 00:20, 53F
推
04/09 00:22, , 54F
04/09 00:22, 54F
→
04/09 00:22, , 55F
04/09 00:22, 55F
→
04/09 03:33, , 56F
04/09 03:33, 56F
→
04/09 03:35, , 57F
04/09 03:35, 57F
→
04/09 03:40, , 58F
04/09 03:40, 58F
→
04/09 03:41, , 59F
04/09 03:41, 59F
→
04/09 03:43, , 60F
04/09 03:43, 60F
推
04/11 00:58, , 61F
04/11 00:58, 61F
→
08/13 16:11, , 62F
08/13 16:11, 62F
→
09/17 14:11, , 63F
09/17 14:11, 63F
討論串 (同標題文章)