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一秒有多远 – 译学馆
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一秒有多远

How far is a second?

你可能听物理学家描述过地月距离为1.3光秒
You may have heard physicists describe the moon as being 1.3 light-seconds away, or the
地日距离有8光分远 并认为这很荒谬
sun as 8 light-minutes away, and thought “what is this nonsense?
用时间测量距离吗
measuring distances with time?”
但实际上 我们几乎每天都在用时间测量距离
But actually, we measure distances using time almost every day.
比如 从你家到商店有多远
How far is it from your house to the store?
大约十分钟
About ten minutes.
从纽约到波士顿有多远
And how far is it from New York to Boston?
大概4小时
About four hours.
洛杉矶到悉尼呢
Los Angeles to Sydney?
14个小时
14 hours.
当然 我们真正的意思是从家骑车到商店要十分钟
But of course, what we really mean is that the store is ten bike-minutes from your house,
纽约到波士顿车程4小时悉尼距洛杉矶乘飞机要14小时
New York is 4 car-hours from Boston, and Sydney is 14 plane-hours from LA.
事实上 用时间表示距离非常有用
In fact, using time to measure distances is so useful that I only know the distance from
我只需知道洛杉矶到悉尼的飞机用时
LA to Sydney in plane-hours, not miles or kilometers… though I suppose I could figure
而不是英里或者千米 虽然我能算出来
it out by multiplying 14 plane-hours by the 550-miles-per-hour speed of a plane to get
14机时×550英里/时≈7500英里
roughly 7500 miles.
从洛杉矶到悉尼坐船要5周 座头鲸要游7个月
But Sydney is also 5 sailboat-weeks from LA, 7 humpback-whale months from LA, 5 message-in-a-bottle
漂流瓶要漂5年 光速需要0.04秒
years from LA, and 0.04 light-seconds from LA.
另外 从地球到月球飞机要飞18天
On the other hand, the moon is 18 airplane-days away, 6 car-months away,
开车6个月 鲸鱼得游15年
and 15 whale-years away.
这意味着 一条鲸鱼要花费自己一生的时间
Which means, amazingly, that a whale might swim as far as the distance to the moon
才游得了地月距离那么远
over the cost of its lifetime .
如果还不够疯狂 我们有时甚至拿距离估量时间
And if that’s not crazy enough, sometimes we even measure times in distance!
一场电影有多长?
How long is a movie?30 meters.
一场电影8000尺
8,000 feet – of film!
那么一集《分钟物理》呢30米长
And MinutePhysics?30 meters.
下期视频:E=mc²
Last video:E=mc²

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视频概述

用时间估量距离 更方便理解距离的方式

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收集自网络

翻译译者

sh

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审核员 V

视频来源

https://www.youtube.com/watch?v=Wp20Sc8qPeo

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