ABOUT THE SPEAKER
Michael Stevens - YouTube educator
Michael Stevens is the creator and host of Vsauce, an educational YouTube channel that addresses scientific oddities, like "Is Your Red the Same as My Red?"

Why you should listen

Michael Stevens is an educator -- but when he answers questions, 3.2 million people tune in to hear the answer. That's because Stevens is the creator and host of Vsauce, an educational YouTube channel that addresses quirky but intriguing topics like "The Science of the Friend Zone" and "What Is Déjà vu?" Stevens has made a career feeding popular hunger for cool and interesting facts.

More profile about the speaker
Michael Stevens | Speaker | TED.com
TEDActive 2013

Michael Stevens: How much does a video weigh?

Filmed:
810,990 views

What color is a mirror? How much does a video weigh? Michael Stevens, creator of the popular educational YouTube channel Vsauce, spends his day asking quirky questions like these. In this talk he shows how asking the right -- seemingly silly -- questions can make incredibly effective lessons.
- YouTube educator
Michael Stevens is the creator and host of Vsauce, an educational YouTube channel that addresses scientific oddities, like "Is Your Red the Same as My Red?" Full bio

Double-click the English transcript below to play the video.

00:14
Bean bags包装袋 are awesome真棒.
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豆袋坐垫很赞.
但我看见那边有些人
00:19
But I see a few少数 people out there
who are standing常设,
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在站着呢,
00:23
we've我们已经 got some over here,
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这边也有一些,
00:24
and standing常设 takes more
work than lounging闲逛.
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站着其实比倚着要费力气。
假如我们使用“坚强生活基金会”
(自行车手阿姆斯特朗创立的基金会)
00:29
Using运用 the Live生活 Strong强大
Organization's组织 online线上 database数据库
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00:32
of weight重量 loss失利 resources资源,
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网页上与减重相关的在线数据库,
00:35
you can calculate计算
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你可以计算出
00:36
that by the time I'm doneDONE
with this speech言语,
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截止我演讲完毕
00:38
those of you who are standing常设
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你们站着的那些人
00:40
will have burned 7.5 more calories卡路里
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就已然比倚在豆袋坐垫中听完演讲的人
多燃烧了7.5卡路里
00:44
than those of you who are bean-bagging豆袋 it.
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00:47
(Laughter笑声)
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好吧, 有个问题,
00:48
Okay, here's这里的 a question,
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00:50
speaking请讲 of weight重量 loss失利,
specifically特别 weight重量,
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谈到减肥, 尤其是说到重量,
00:53
this speech言语 is live生活.
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这个演讲是直播的.
00:54
I'm actually其实 here in front面前 of you guys,
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我其实就站在你们面前,
我们都在一起呢.
00:56
we're all here together一起.
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但是这个演讲被录了下来
00:57
But this speech言语 is being存在 recorded记录
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00:59
and it will become成为 a video视频
that people can access访问 all over the world世界
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然后它会被做成一个视频
全世界人民都能
在电脑上
01:03
on computers电脑, mobile移动 devices设备,
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在移动设备上
01:05
televisions电视.
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和电视上看到.
01:06
I weight重量 about 190 pounds英镑.
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我大概190磅重 (译者: 约合86公斤)
那这段视频的重量是多少?
01:11
How much will the video视频 weigh称重?
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问这种问题
01:18
Asking questions问题 like that
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就是我每周在我的频道(Vsauce)上做的事.
01:20
is what I do every一切 week
on my channel渠道 VsauceVsauce.
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最近两年
01:23
For the last two years年份,
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我一直在问特别有意思的问题,
01:24
I have been asking really fun开玩笑 questions问题,
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01:26
mind-boggling令人难以置信 questions问题,
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令人震惊的问题,
01:28
and approaching接近 them
as sincerely诚挚 as I can,
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然后
尽可能真诚地试着解答它们,
01:31
celebrating庆祝 scientific科学
concepts概念 and scientists科学家们.
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以此来宣扬科学观念和科学家们.
01:34
And I research研究 and write
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我做调查
写作
01:36
and produce生产 and host主办
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制作
主持
01:37
and edit编辑 and upload上载
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编辑
然后上传
01:38
and run the social社会 media媒体 all by myself,
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整个社会媒体都是我自己一个人在运作,
01:40
but it's not lonely孤独,
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但(我)并不孤独
01:42
because VsauceVsauce has
more than 2 million百万 subscribers用户,
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因为Vsauce 有超过2百万订阅者,
01:45
and every一切 month, my videos视频 are seen看到
by more than 20 million百万 people.
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每个月我的视频
都有超过2千万的人观看.
01:50
Yeah.
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没错.
01:52
(Applause掌声)
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01:54
It's very exciting扣人心弦.
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很令人兴奋呢.
01:55
I've found发现 that asking a strange奇怪 question
is a great way to get people in,
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我发现问一个奇怪的问题
是个让大家感兴趣的极好办法,
02:01
not just people, but fans球迷.
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不单单是吸引人, 更是吸引粉丝.
02:03
And fans球迷 are different不同
than just viewers观众 or an audience听众,
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粉丝们和普通观看者、收听者不同
因为粉丝还想回来.
02:06
because fans球迷 want to come back.
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02:08
They subscribe订阅 to you on YouTubeYouTube的
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他们在YouTube上订阅你的频道
02:11
and they want to watch
everything you've made制作
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他们想看你制作过的所有内容
和未来将要制作的所有内容
02:13
and everything you plan计划
to make in the future未来
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因为我们是好奇心强的人
02:15
because we are curious好奇 people
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02:18
and sparking火花 curiosity好奇心 is great bait.
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而激起好奇心是个极佳的诱饵.
02:23
It's a great way to catch抓住 a human人的.
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是抓住一个人注意力的极佳方式.
02:26
And once一旦 you've caught抓住 them,
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而且一旦你抓住他们的注意力,
你就有了一个被俘获的听众
02:27
you have this captive俘虏
audience听众 that you can,
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02:31
with the goal目标 in mind心神
of answering回答 the question,
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带着回答问题的目标
你就能意外地教给他们很多东西.
02:33
accidentally偶然 teach a lot of things to.
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02:36
So, let's take a look
at some of my videos视频.
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所以, 我们来看看我做过的一些视频.
02:39
Here are eight of them.
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这儿有8个.
02:41
But down here in the lower-right右下 corner,
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但在右下角这个地方,
"镜子是什么颜色的?"
02:43
"What Color颜色 is a Mirror镜子?"
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02:45
When people see that,
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当人家看到这个,
02:46
it's very difficult not to click点击,
because you think,
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就很难不去点击. 因为你们在脑子里想:
“哎哟我去, 你是认真的么?
02:49
"Come on, are you serious严重?
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你怎么可能答出这种问题呢?"
02:50
How could you possibly或者
answer回答 that question?"
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嘿至今760万人看过
02:53
Well, so far, 7.6 million百万
people have watched看着
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02:58
this five-minute五分钟 video视频
about what color颜色 a mirror镜子 is.
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这个时长5分钟的, 关于镜子是什么颜色的视频了.
03:00
And in that episode插曲, I answer回答 the question
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而在这一期中, 我回答了这个问题
而我也有机会解释
03:02
and I get a chance机会 to explain说明
what would normally一般 be kind of dry topics主题:
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一些正常情况下有点枯燥的话题:
03:07
optics光学,
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光学,
漫射和镜面反射,
03:08
diffuse扩散 versus specular镜面 reflection反射,
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03:10
how light works作品,
how light works作品 on the retina视网膜,
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光如何传播,
光在视网膜上如何映射,
甚至是有关颜色的术语的语言学探讨
03:12
and even the etymology词源 of color颜色 terms条款
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比如白和黑.
03:14
like white白色 and black黑色.
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好吧, 剧透警告:
03:17
Okay, spoiler扰流板 alert警报:
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03:19
mirrors镜子 are not clear明确,
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镜子不是清透的,
03:21
they are not silvery银色,
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他们不是银色的,
03:23
like they're often经常 illustrated插图.
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好像他们经常被说成的样子.
03:24
Mirrors镜子, technically技术上 speaking请讲,
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镜子, 实际上来讲,
是一点点, 就一点点
03:26
are just a tiny, tiny, little bit ...
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03:29
green绿色.
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绿色的.
03:30
You can demonstrate演示 this
by putting two mirrors镜子 next下一个 to each other,
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来证明这一点
你可以通过把两面镜子相对摆放
这样一来
03:33
facing面对 so they reflect反映
back and forth向前 forever永远.
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两面镜子会做无穷次的来回反射.
顺着无穷次反射看下去
03:36
Look down that infinite无穷 reflection反射,
and it will get dimmer调光器,
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它会变得越来越暗
03:39
because some light is lost丢失
or absorbed吸收 every一切 time,
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因为每次反射都有一部分光丢失或被吸收了.
03:42
but it will also become成为 greener更环保,
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同时它也变得越来越偏绿色
03:46
because green绿色 light,
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因为绿光,
03:47
that is light of a wavelength波长
that we perceive感知 as green绿色,
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也就是说
我们认作是绿色的那个波长的光
03:50
is best最好 reflected反射的 by most mirrors镜子.
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是被大部分镜子反射得最好的一种光.
03:54
Okay, so, how much does a video视频 weigh称重?
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好吧, 那, 一个视频到底多重呢?
03:56
Well, when you stream
a video视频 onto your computer电脑,
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当你用电脑观看一个视频时,
03:59
that information信息 is temporarily暂时 stored存储
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信息借助电子
04:01
using运用 electrons电子.
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被暂时储存
04:03
And the number of electrons电子 on your device设备
won't惯于 actually其实 increase增加 or decrease减少.
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而你设备上的电子数量
实际上不会增减.
04:08
But it takes energy能源
to store商店 them in one place地点,
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但是, 把它们储存在一个特定地方是要耗能的,
04:11
and, thanks谢谢 to our friend朋友 Albert阿尔伯特 Einstein爱因斯坦,
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而我们知道,
托我们的朋友阿尔伯特爱因斯坦的福,
04:14
we know that energy能源 and mass are related有关.
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能量和质量是相关的.
04:16
Okay, so here's这里的 the thing:
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好, 所以这事儿是这样的:
04:18
let's say you're watching观看 a YouTubeYouTube的 video视频
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假设你在看一个Youtube视频
分辨率特别高, 有720p.
04:20
at a really nice不错 resolution解析度, 720p.
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04:23
Assuming假设 a typical典型 bit rate,
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假设比特率是通用型的,
04:25
we can figure数字 that a minute分钟
of YouTubeYouTube的 video视频
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那么我们可以算出来
Youtube视频一分钟
04:30
is going to need to involve涉及
about 10 million百万 electrons电子 on your device设备.
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会牵涉你设备上的1千万的电子.
把这些电子的个数
04:38
Plugging all those electrons电子
and the energy能源 it takes to hold保持 them
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和需要把这些电子放在正确位置上
让你观看视频的能量
04:41
in the correct正确 place地点
for you to see the video视频,
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代入到公式里,
04:43
into that formula,
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我们能算出来
04:44
we can figure数字 out
that one minute分钟 of YouTubeYouTube的 video视频
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一分钟的Youtube视频
使你电脑的重量
04:47
increases增加 the mass of your computer电脑
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增加了10^(-19)克.
04:50
by about 10 to the negative 19th grams.
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04:55
Written书面 out, it looks容貌 like this.
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把它展开写出来, 就是这样.
04:57
(Whistle)
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这没多少.
04:58
That's like nothing.
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你可以说它根本和没有一样
05:00
You could call that nothing,
and you wouldn't不会 really get in trouble麻烦,
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也不会有什么问题
因为我们到目前为止发明出的
05:04
because the best最好 scales
we've我们已经 ever invented发明
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05:07
that we could try to use
to actually其实 to detect检测 that change更改
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能被用来
检测出重量变化的最好的称
05:10
are only accurate准确 to 10
to the negative 9th grams.
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只能精确到10^(-9)克.
所以我们测不出来,
05:13
So, we can't measure测量 it,
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05:15
but we can, like we just did,
calculate计算 it.
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但是我们能(并且已经)
计算出来这个增加的数值
05:17
And that's really cool
because when I was a kid孩子,
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而这太酷了
因为在我的孩提时代,
05:20
my school学校 had two shelves货架
of science科学 books图书.
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我们学校有两书架的科普读物.
05:25
That was really cool,
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确实有不少,
05:26
but I read all of them
within, like, two grades等级,
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可我在差不多两年之内就把它们都读完了,
05:28
and it was hard to get more books图书
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很难获得更多的书
因为书很重
05:30
because books图书 are heavy,
you need space空间 for them
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你需要找地方存放它们
而把书搬来搬去
05:33
and moving移动 books图书 around is tougher强硬
than what we can do today今天.
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比我们现今要难上许多.
就通过这么小一个数字,
05:35
With numbers数字 that small,
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05:37
I can fit适合 thousands数千 of books图书
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我就可以在我的个人电子阅读器里
05:39
on my own拥有 little personal个人
electronic电子 reader读者.
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塞进上千本书.
05:43
I can stream hours小时 and hours小时
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我可以看上几小时
05:45
and days and days of YouTubeYouTube的 video视频
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甚至几天的Youtube视频
05:47
without my computer电脑
ever getting得到 measurably可测量 heavier较重.
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我的电脑都不会有什么察觉得出来的重量变化
当信息变轻的时候,
05:52
And as information信息 becomes that light,
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05:54
it becomes a lot more democratic民主的,
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它也变得越来越民主,
也就是说比原来更多的老师
05:55
meaning含义 that more teachers教师
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05:58
and presenters主持人 and creators创作者
and viewers观众 than ever before
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演讲者
创作者
和观看者
06:03
can be involved参与.
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可以参与进来.
06:06
Right now, on YouTubeYouTube的,
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现在在Youtube网站上
就有像这样的
06:07
there is an explosion爆炸
of content内容 like this happening事件.
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信息大爆炸.
06:10
The three VsauceVsauce channels渠道
are down there in the corner.
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三个Vsauce频道
就在角落这里.
但是其他人
06:13
But everyone大家 else其他,
all together一起, collectively,
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加在一起,
他们的观看数量使我一个人的能力
06:15
their views意见 dwarf矮人 what I can do alone单独
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06:18
or with the people that I work with,
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或是我共事的人们的能力 相形见绌.
06:20
and that is really, really exciting扣人心弦.
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而这真是非常, 非常令人兴奋的.
06:22
It turns out that tapping窃听
into people's人们 curiosity好奇心
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抓住人们的好奇心
06:25
and responsibly负责任 answering回答 their questions问题
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并负责任的回答他们的问题
06:28
is a brilliant辉煌 way to build建立
fans球迷 and an audience听众
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是个增加粉丝, 听众和观众
06:32
and get in viewers观众.
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的极佳方法.
06:33
It's even a great way
for brands品牌 and companies公司
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这甚至是品牌和公司
06:36
to build建立 trust相信.
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建立信誉的好方法.
所以说计算一个视频的重量,
06:38
So, calculating计算 the weight重量 of a video视频
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06:43
is kind of a funny滑稽 question,
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好像是个滑稽的问题,
06:45
but I cannot不能 wait to see
what we ask and answer回答 next下一个.
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但是我等不及想要看到
我们下一个问出并解决的问题是什么.
06:51
As always, thanks谢谢 for watching观看.
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一如往常, 谢谢观看.
06:53
(Applause掌声)
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Translated by Yixuan Liu
Reviewed by Rong Han

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ABOUT THE SPEAKER
Michael Stevens - YouTube educator
Michael Stevens is the creator and host of Vsauce, an educational YouTube channel that addresses scientific oddities, like "Is Your Red the Same as My Red?"

Why you should listen

Michael Stevens is an educator -- but when he answers questions, 3.2 million people tune in to hear the answer. That's because Stevens is the creator and host of Vsauce, an educational YouTube channel that addresses quirky but intriguing topics like "The Science of the Friend Zone" and "What Is Déjà vu?" Stevens has made a career feeding popular hunger for cool and interesting facts.

More profile about the speaker
Michael Stevens | Speaker | TED.com