評(píng)論
打印
So if you popped open the blueberry and were searching for the nucleus
如果你在藍(lán)莓的內(nèi)部搜索原子核，結(jié)果是一無(wú)所獲。
You know what? It would be invisible. It's too small to see!
知道為什么嗎？因?yàn)槲覀兛床坏剿∷×耍覀兛床坏剑?/div>
OK. Let's blow up the atom -- the blueberry -- to the size of a house.
因此我們把原子，也就是藍(lán)莓，放大到房子的尺寸。
So imagine a ball that is as tall as a two-story house.
想象一下有兩層房屋那么高。
Let's look for the nucleus in the center of the atom.
然后在尋找原子中央的原子核，
And do you know what? It would just barely be visible.
你知道嗎？原子核還是幾乎不可見。
So to get our minds wrapped around how big the nucleus is,
所以想要直到原子核到底有多大，
we need to blow up the blueberry, up to the size of a football stadium.
我們必須把藍(lán)莓放大到橄欖球場(chǎng)那樣大。
So imagine a ball the size of a football stadium,
然后想象一下橄欖球場(chǎng)大小的球。
and right smack dab in the center of the atom, you would find the nucleus, and you could see it!
原子不偏不倚的中央一小點(diǎn)，你就會(huì)找到原子核，而且你可以看得到它。
And it would be the size of a small marble.
而它只有玻璃彈珠大小。
And there's more, if I haven't blown your mind by now.
不僅僅如此，如果現(xiàn)在你都沒有被震撼到，
Let's consider the atom some more. It contains protons, neutrons and electrons.
我們來(lái)更詳盡地了解原子。原子中包含了質(zhì)子，中子，電子。
The protons and neutrons live inside of the nucleus, and contain almost all of the mass of the atom.
質(zhì)子和中子是在原子核之內(nèi)，且占了原子大部分的重量。
Way on the edge are the electrons.
在原子邊緣的是電子。
So if an atom is like a ball the size of a football stadium,
如果原子像一個(gè)橄欖球場(chǎng)那樣大的話，
with the nucleus in the center, and the electrons on the edge, what is in between the nucleus and the electrons?
原子核在中央，而電子在邊緣，那么兩者之間的東西又是什么呢？
Surprisingly, the answer is empty space. That's right. Empty!
相當(dāng)令人驚訝，答案是什么都沒有。沒錯(cuò)，空無(wú)一物！
Between the nucleus and the electrons, there are vast regions of empty space.
在原子核和電子之間，存在著大片的空洞區(qū)域。
Now, technically there are some electromagnetic fields, but in terms of stuff, matter, it is empty.
嚴(yán)格的說(shuō)來(lái)那里存在著電磁場(chǎng)，但就本質(zhì)而言，那里是空的。
Remember this vast region of empty space is inside the blueberry,
記得這一大片空間，是位于和組成地球的藍(lán)莓一樣大的原子之中
which is inside the Earth, which really are the atoms in the grapefruit.
組成地球的藍(lán)莓就好比是葡萄柚里的原子。
