作者查詢 / mtdas
作者 mtdas 在 PTT [ EarthScience ] 看板的留言(推文), 共152則
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收起看板(982)
2F→:因為遠 不是因為大 真實比例 http://tinyurl.com/26c34wd05/24 17:24
1F→:(1)對 (2)對 而且全球各地皆6AM日出/6PM日沒05/13 00:53
2F→:啊 不對 我看錯了 (1)是到北極圈 不是北極點 北極點是永晝05/13 00:55
4F→:超過極圈 就沒有日出日沒可言了 因為24hr太陽都在地平線以上05/13 00:56
8F→:二樓是對的 愈北緯 日出愈偏北05/12 20:01
10F→:北緯66.4度呢?05/12 20:31
12F→:但地表不是平的哦 所以夏至時北緯66.5度的"日出"是正北方05/12 20:38
20F→:不不... 夏至時北緯66.5度的"日沒"也是正北方喔 XD05/12 20:53
22F→:在你圖的日夜交界線"最上方" 你看一下太陽會從哪裡出沒05/12 20:55
23F→:北緯89.9度不會有日出日沒啊 整天都白天 :P05/12 20:56
26F→:不然請你拿顆球來模擬好了..05/12 21:00
28F→:對 但該拿球的不是我 ^^|05/12 21:01
29F→:我先來說結論吧 夏至時從赤道往北或往南 日出都會愈來愈偏北05/12 21:03
30F→:直到兩側極圈線(66.5度) 將都從正北日出05/12 21:04
34F→:赤道 回歸線 近極圈處 不會一樣 都是東北 但偏北程度會有差05/12 21:12
38F→:那天赤道日出方位角是66.5度 全球有日出的任意點都小於66.505/12 21:24
40F推:不客氣 就像前三篇我的推文 看圓會有盲點 球沒圓那麼單純05/12 21:27
49F→:我看不太懂樓上的敘述 但這幾字是錯的"愈早日出的點愈偏北"05/12 22:42
50F→:例如 往南靠近南極圈處 快中午才日出 但還是接近正北日出05/12 22:44
53F→:跟6點不6點的也沒有關係啊 @@05/12 22:56
56F→:我是說ru8bj那個被關閉的圖 那圖哪來的訂在6點?05/12 22:59
60F→:r板友原先"和緯度無關的推論，錯在把'地球當平的'！"05/12 23:01
62F→:不是這樣 r板友的圖都已經傾斜地球了 明顯只訂赤道是6點啊05/12 23:03
63F→:就算不看那圖 跟6點也沒有關係..05/12 23:03
68F→:反正跟6點沒關係啦 不然我改成這樣問 對於南半球li大怎解釋?05/12 23:10
74F→:r板友辛苦了 但我想..呃..還是需要立體一點的圖形才好解釋..05/12 23:40
78F→:那換我畫吧..05/12 23:56
79F→:隨便畫一畫..看得懂就好 >///< http://tinyurl.com/23drwy205/13 00:10
80F→:然後再隨便補個時間 XD http://tinyurl.com/23ubpqf05/13 00:18
86F→:樓上是指我的圖? 我的圖沒畫錯喔~ :P05/13 13:35
89F→:這圖就是我一直以來的意思呀 十字架變形就是因為地球有弧度05/13 13:39
91F→:入射角度不會有影響 因為視陽光為平行光05/13 13:40
92F→:而且仔細看我的圖 可發現離開赤道 角度會愈來愈偏北05/13 13:41
93F→:ex橙色線約北緯45度 太陽幾乎從東北升起 比赤道東北東更偏北05/13 13:42
95F→: :)05/13 13:48
97F→:tinyurl.com/23drwy2 → http://tinyurl.com/3uhp8ze09/01 14:37
98F→:tinyurl.com/23ubpqf → http://tinyurl.com/3od9f3g09/01 14:37
2F推:(1)假設地球為完美的球形.. 1:(1-2*(sin(23.5degree))^2)05/11 17:01
3F→:(2)會05/11 17:01
4F→:http://yfrog.com/c919764686j 日夜長度比就是紅藍線長比05/11 17:24
5F→:自己再畫條輔助線就能求線段長度比了05/11 17:25
7F推:3:1顯然錯得太離譜 但2F~5F其實也不對 那是騙國高中生的算法05/12 00:27
8F→:想說應該要有人發現了 結果好像就這樣要被我矇混過去..? XD05/12 00:27
9F→:其實上該看紫綠比 而非紅藍比 http://yfrog.com/2g19869998j05/12 00:39
10F→:須用反三角函數去算 http://ppt.cc/p!hJ 即約1.276:105/12 00:39
11F→:以上算式不考慮地球公轉/扁率/地形等 而與事實差約9分鐘05/12 00:39
3F推:推這篇05/06 20:06
2F推:來預測一下 下次的地震?05/05 12:56
1F推:角度於其間擺盪 非定值04/16 17:10
2F推:和緯度有關04/09 22:51
21F→:那篇原始文章被人轉到garbage看板..03/08 22:43
23F推:新聞寫是潮洲斷層03/04 12:10