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真空中的球形雞
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基本資料 | |
用語名稱 | 真空中的球形雞 |
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用語出處 | 加拿大科學家凱伊的方法,後引申為物理學笑話 |
真空中的球形雞源自一個物理學笑話。用於諷刺盲目簡化條件假設前提、過度簡化(物理)模型,以至於得出的結論完全不符合現實的情況。
笑話
經典美劇《生活大爆炸》第一季第九集中,實驗物理學家萊納德·霍夫斯塔德博士在高能粒子學講座前想要先講一個活躍氣氛的笑話。
“ | There is this farmer and he has these chickens. But they won't lay any eggs, so he calls a physicist to help. The physicist then does some calculations, and he says, "I have a solution, but it only works with spherical chickens in a vacuum."
有個農民,他養了一些雞,但是它們不下蛋,所以他去找物理學家求救。這個物理學家便做了些計算,然後說:「我有個辦法,不過只適用於真空中的球形雞。」 |
” |
笑話完整版為:
“ | There is this farmer who is having problems with his chickens. All of the sudden, they are all getting very sick and he doesn't know what is wrong with them. After trying all conventional means, he calls a biologist, a chemist, and a physicist to see if they can figure out what is wrong. So the biologist looks at the chickens, examines them a bit, and says he has no clue what could be wrong with them. Then the chemist takes some tests and makes some measurements, but he can't come to any conclusions either. So the physicist tries. He stands there and looks at the chickens for a long time without touching them or anything. Then all of the sudden he starts scribbling away in a notebook. Finally, after several gruesome calculations, he exclaims, "I've got it! But it only works for spherical chickens in a vacuum."
有一個農民,他養的雞出現了一些毛病:這些雞突然生病了,但他不知道其中的原因。在嘗試了所有的土辦法之後,他叫來了一名生物學家、一名化學家和一名物理學家,看看他們能否找出問題所在。生物學家看看雞,對他們進行了一番檢查,表示不知道有什麼問題。化學家做了一些測試和測量,但他也沒能得出任何結論。於是物理學家開始了嘗試。他站在那裏,盯着雞看了很長時間,並沒有進行接觸。突然,他開始在小本子上奮筆疾書。最後,經過幾次複雜的計算,他聲稱:「我懂了!但這隻適用於真空中的球形雞。」 |
” |
聽懂了笑話的工程師霍華德和天體物理學家拉傑笑得前仰後合,後來正在和萊納德慪氣的尖酸刻薄的理論物理學家謝爾頓也承認這個笑話很「Hilarious」。
解釋
在物理學中,為了讓計算更簡單,一個物體通常都會被假設為真空中的球形或是正方形。笑點在於現實中「真空中的球形雞」這樣的隨意、盲目的前提根本不存在,但大家的確就是這麼學物理的。
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