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没有第四维度

There is no "Fourth" dimension

我想去澄清一个误解:第四维度是不存在的
I’d like to clear up a misconception: there is no fourth dimension.
事实上 第三维度也是不存在的
As a matter of fact, there is no third dimension, either.
但是 那句话的意思并不是不存在三个维度 它们是存在的 但是只是我们
Now, by that I don’t mean that there aren’t three dimensions… there are, but just we
不能够把三个维度区分开:没有特别的方向让你你可以叫“第一
can’t tell these dimensions apart: there’s no special direction you can call “the 1st
维度”(北方?
dimension,” [north?
东方?
east?
上方?)所以说这是“这是第二维度”或者“什么是第四维度”这样的话是没有意义的
up?] so it doesn’t make sense to say “this is the 2nd one,” or “what’s the fourth one?”
这就像你有一个装了三杯水的罐子…
It’s like if you have a jug with three cups of water in it…
说这里有三杯水很容易 但是哪一杯是第一杯?第二杯?或者第三杯?
it’s easy to tell that there ARE three cups of water, but which is the first cup? the second? or the third?
这些问题都是没有意义的
Those questions don’t even make sense!
那也就是说 也许会有一些不同种类的维度你不能把它们区分开
That said, there may be different KINDS of dimensions that you CAN tell apart – like
如果你在你的维度罐中倒入三倍水和一杯油
if you poured three cups of water and one cup of oil into our dimensions jug.
之后你可能是会说“我有了三个性质相同的维度和一个
Then you could say “I have three dimensions that behave in the same way, and one that
性质不同的维度”
behaves a different way.”
这就是我们的意思当我们说我们生活在三个空间维度和一个时间
And that’s what we mean when we say that we live in three spatial dimensions and one time
维度中
dimension.
所以再另外加一杯水这样你就可以有四杯水和一杯油这件事也不是那么疯狂
And there’s nothing crazy about adding another cup of water so that you’d have four watery cups and one oily cup;
同样的 我们可以思考宇宙是什么样的如果这里有
likewise we can contemplate what the universe would be like if there were
四个空间维度和一个时间维度 或者在一个弦理论中 有九个空间
FOUR spatial dimensions and one time dimension… or in the case of string theory, nine spatial
维度和一个时间维度
dimensions and one time dimension.
尽管我们存在于这个维度中 但是思考题这里可能存在两个维度这件事对我们来说并不困难
And while we’re at it, it’s not even too hard to conceive that there might be two dimensions of time.
但是在现在我甚至没有足够的时间去解释一个时间维度
but I don’t have even have enough of one time dimension to explain that now.
所以如果你希望用你的大脑去看四维空间世界 查阅
So if you’d like to try your brain at visualizing a world with four spatial dimensions, check
Flatland这本书或者去拼一个4D魔方
out the book Flatland or try solving a 4D rubiks cube.

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视频概述

简要解释为什么没有第四维度并且介绍了空间维度和时间维度这两个概念

听录译者

收集自网络

翻译译者

浅叶飞月

审核员

审核员 AF

视频来源

https://www.youtube.com/watch?v=M9sbdrPVfOQ

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