評論
打印
So what's the problem?
這是怎么回事？
Anyone can understand that speed is relative to your perspective.
大家都知道 速度多少是相對于觀察點的
But when you remember that unlike the speed of the toy train.
不同于玩具火車的車速
the speed of light is fixed no matter what your perspective.
無論從任何觀察點 光速始終保持恒定
then that common sense view things starts to break down.
因此一般的觀點就開始瓦解
To explain why Einstein imagined a train,too.
為了解釋原因 愛因斯坦也想象出一列火車
Only his was full-sized.
只不過是真實大小的
He devised a thought experiment,asking how something as simple as the lighting of a cigarette light tip.
他設計了一項思考實驗 探尋像點燃打火機這么簡單的事
would look to people with different points of view.
為何不同的人會看到不同的結果
He imagined a man playing with his lighter in the center of a railway car.
他想象有人在車廂中央玩打火機
being watched by two people at either end.
車廂兩頭各有一個人在看
Both at exactly the same distance from the lighter.
兩人與打火機的距離相等
Einstein said the interesting question is not what do these people see.
愛因斯坦表示值得探究的問題 不在這兩人看見了什么
But when do they see it.
而是何時看見
Because they're in the same car or moving together at the same speed.
因為他們都在同一節車廂里以相同的速度前進
the two observers see the light at exactly the same time.
兩名觀察的人都在同一時間看見火光
