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  • In our everyday world, we're used to absolute, deterministic predictions: throw a ball in

    在我們的日常生活中,我們習慣於絕對的、確定性的預測:把一個球扔到

  • the air, and it'll fall along an ellipse; leave your umbrella parked on the street,

    的空氣,它'會沿著橢圓落下;離開你的傘停在街上。

  • and when you come back, it's still there, just one umbrella.

    而當你回來的時候,它'還在,只是一把傘。

  • Quantum physics is not like this - because quantum mechanics doesn't allow us to make

    量子物理學並不是這樣的--因為量子力學不允許我們做。

  • absolute predictions about the future. It only predicts the likelihoods of different

    對未來的絕對預測。它只預測了不同的可能性。

  • outcomes to happen, and doesn't say anything about which one will happen. "Well," you might

  • say, "that's the same with the weather - the weatherman only tells you what the chance

    說,"那'的天氣一樣--天氣預報員只告訴你什麼機會

  • of rain is; he can't tell you whether or not it will rain."

    的雨是;他不能告訴你是否會下雨.&quot。

  • But maybe the weatherman just doesn't have good enough knowledge of exactly where all

    但也許天氣預報員只是沒有足夠的知識,到底在哪裡所有的

  • of the air and water molecules in the world are, nor a good enough model of how they interact

    的空氣和水分子,也沒有一個足夠好的模型來說明它們如何相互作用。

  • or a fast enough computer to simulate all of their bajillion interactions. Maybe in

    或足夠快的電腦來模擬他們所有的億萬次互動。也許在

  • principle, if he had enough data and a fast enough computer, his weather model could tell

    原則上,如果他有足夠的數據和足夠快的電腦,他的天氣模型就能告訴他:"你的天氣預報是什麼?

  • you exactly where every raindrop would fall. Right? This reasonable idea, that if you just

    你的每一滴雨滴都會落在哪裡。對吧?這個合理的想法,如果你只是

  • had more data you could explain everything, is the classical, deterministic view of the

    有更多的數據,你可以解釋一切, 是經典的,決定論的觀點。

  • universe.

    宇宙。

  • And for a while, many physicists, including Einstein, thought the same had to be true

    而有一段時間,包括愛因斯坦在內的許多物理學家都認為也必須如此

  • with quantum mechanics - maybe we just didn't have enough information to put into our quantum

    與量子力學--也許我們只是沒有足夠的資訊放入我們的量子

  • models; maybe there were classical variables that were hidden from us and our experiments,

    模型;也許有一些經典的變量被我們和我們的實驗所隱藏。

  • inputs that explained everything perfectly with no need for quantum mechanics and its

    的輸入,完美地解釋了一切,不需要量子力學和它的。

  • "I'll give you 50/50 odds on the cat being dead" mentality.

    "我'給你五五開的機會,貓死了"心態。

  • Except, it turns out that we can actually test whether or not this sort of classical,

    只是,原來我們其實可以檢驗這種經典是否。

  • underlying explanation of quantum physics can exist even in principle. The details are

    量子物理學的底層解釋即使在原則上也可以存在。細節是

  • a topic for another video, but the experiments tell usthere is no classical, everyday,

    另一個視頻的主題, 但實驗告訴我們... 有沒有經典的,每天。

  • underlying description of quantum mechanics.

    量子力學的基本描述。

  • And this means, Einstein, that the universe is quantum mechanical whether you like it

    這意味著,愛因斯坦,宇宙是量子力學的,不管你是否喜歡。

  • with a 50% chance, or not.

    有50%的機率,或者不。

  • ps, I'm excited to announce that MinutePhysics is now supported by MinutePhysics t-shirts.

    ps,我'很興奮地宣佈,MinutePhysics現在由MinutePhysics T恤支持。

  • Get yours now at dftba.com/minutephysics and don't forget to be awesome.

    現在就去dftba.com/minutephysics獲取你的作品,別忘了要厲害。

In our everyday world, we're used to absolute, deterministic predictions: throw a ball in

在我們的日常生活中,我們習慣於絕對的、確定性的預測:把一個球扔到

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B2 中高級 中文 量子 力學 天氣 足夠 預測 經典

我們能預測一切嗎? (Can we Predict Everything?)

  • 76 14
    Why Why 發佈於 2013 年 03 月 29 日
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