Quod Erat Demonstrandum

2010/06/08

[FW] 以日落照片估計地球直徑

Filed under: Fun,Report — johnmayhk @ 12:32 下午
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以簡單儀器,比如竹枝、間尺和量角器便可估計地球之直徑。

原來利用一張日落圖片也可,且看

Robert J. Vanderbei 的介紹:

http://orfe.princeton.edu/~rvdb/tex/sunset/ms.pdf

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