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[文化博览] 【整理】2012-03-28 阿尔伯特·爱因斯坦 Einstein—7

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it down. But you know, Isaac Newton himself was not satisfied by that. Objects move because they are pushed, not pulled. Objects move because they are pushed. So what is pushing this? Newton didn't know. So Newton simply threw his hands up and said, I don't know, so I'm gonna invent something called gravitational pull. And Einstein said, no, this theory can't be right.

He was prepared to simply go "I really want to solve this problem. I want to really understand the whole universe."

Max Planck said to him, you can work on gravity if you want to. But you have two problems.

You are not gonna be successful. The problem is too hard.

And if you do, no one will believe you.

It's an extremely difficult task. It's not clear where to begin or how to go about doing it at all. Ultimately, the thing that gives him that clue turns out to be his old faithful way of reasoning, the thought experiment.

The thought you and I would call day dreaming but he gets to call them thought experiments because he's Einstein.

He's in his office, the patent office, looking out of the window and he imagined a man working on a roof. And he begins to wonder what would happen if one of those men were to fall off the roof.

And then he had the happiest thought of his life, the inspiration of the ages.

He had a vision the man would not actually be feeling his own weight.

He would be weightless. And then he imagined, if you are in elevator and somebody cuts the cord, what happens to you? You fall, but the elevator falls at the same rate you do, so you are weightless inside the elevator. So then Einstein got it.

It's as though gravity's been switched off. What's really going on?

There is no such thing as gravitational pull. The earth has curved the space around me. And space is pushing me into this chair. Space itself can be curved.
HM
Pulling it down, but you know, Einstein knew Newtown himself was not satisfied by that. Objects move because they are pushed, not pulled, object moves because they are pushed, so what is pushing this? Newtown did not know, so Newtown simply threw his hands up, and said I don’t know. So I am gonna invent something call gravitational pull, and Einstein said, no this theory can’t be right.
He was prepared to simply go, I really want to solve this problem, I want to really understand the whole universe.
Max Planck said to him, you can work on gravity if you want to, but two problems, you are not gonna to be successful, the problem is to hard.
And if you do, no one will believe you. It’s extremely difficult task, it’s not clearly where to begin or how to go about doing it at all. Ultimately, the thing that gives him that clue turns out to be his all faithful way of reasoning.
The thought experiment, the thought you and I call daydreaming, but he gets to call thought experiment because he is Einstein.
He is, in his patent office, looking out of the window, and he imaged a man walking on the roof, and he begins to want what would happen if one of these men were to fall off the roof.
And then he had the happiest thought of his life, the inspiration of the ages.
He had a vision the man will not actually be felling his own way
He would be weightless, and then he imaged if you are in elevator and somebody cuts the cord what happens to you? You fall but the elevator falls as the same rate you do, so you are weightless inside the elevator, so then Einstein got it.
It’s so gravity has been switched off, what’s really going on?
There is no such thing as gravitational pull, the earth has curved the space around me, and space is pushing me into this chair, space itself can be curved
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