送交者: HunHunSheng 于 2005-1-12, 17:12:57:

回答: doesn't matter 由 wasguru 于 2005-1-12, 17:08:27:

I don't think so. They have to be measured simultaneously in terms of absolute time
There are many places around the world's equator where sunlight can reach the bottome of a well at the right angle.

Here "the same time" must mean the same time
in absolute sense, ie.e Greenwich Time

• 混混脑子糊涂了,你的同时也是可以算的,不过就不需要夏至这个概念了. - wangle (43 bytes) 2005-1-12, 17:22:11
  • That is my original question: how to you make sure 同时测定 - HunHunSheng (157 bytes) 2005-1-12, 17:26:33
    • 测量最短距离,就保证它是夏至中午,当然还要测出两地连线和这时影子的角度. - wangle (0 bytes) 2005-1-12, 17:32:21
      • Noon at one city might be ahead of or lag behind the noon at the other city - HunHunSheng (0 bytes) 2005-1-12, 17:34:21
        • It is still possilbe to get simultaneity if you really want it - wasguru (105 bytes) 2005-1-12, 21:29:41

加跟贴