How much does a video weigh? - Michael Stevens of Vsauce

譯者: 峻碩kenny 張chang 審譯者: Henry Black

Bean bags are awesome.

懶骨頭沙發超棒的

可是我看到那裡一些人

But I see a few people out there who are standing,

是站著的

we've got some over here,

這裏也有些人站著

and standing takes more work than lounging.

站著比躺著需要花更多的力氣

Using the Live Strong Organization's online database

使用LiveStrong組織的線上資料庫

of weight loss resources,

減重的資源

you can calculate

你可以計算出

that by the time I'm done with this speech,

當我演講完以後

those of you who are standing

這些站著的人

will have burned 7.5 more calories

消耗的卡路里會比

than those of you who are bean-bagging it.

躺在懶骨頭沙發上的人多7.5卡

(Laughter)

Okay, here's a question,

有個問題

speaking of weight loss, specifically weight,

說到減重,特別是重量

this speech is live.

這是場現場的演講

I'm actually here in front of you guys,

我真的站在各位前面

we're all here together.

我們一起在這裏

But this speech is being recorded

可是這場演講有錄影

and it will become a video that people can access all over the world

會成為一部影片

讓全世界的人都可以在

on computers, mobile devices,

電腦上

行動裝置上

televisions.

電視上看到

I weight about 190 pounds.

我大約有190磅重 (約86公斤)

How much will the video weigh?

這個影片會有多重？

Asking questions like that

每週在我的Vsauce視頻上

我都會提出這樣的問題

is what I do every week on my channel Vsauce.

最近兩年來

For the last two years,

I have been asking really fun questions,

我都有在問很好笑的問題

mind-boggling questions,

難以想像的問題

and approaching them as sincerely as I can,

我盡可能的真誠

去探討問題

celebrating scientific concepts and scientists.

以此來宣揚科學觀念和科學家們

And I research and write

我做調查

寫作

and produce and host

製作

and edit and upload

主持

編輯

然後上傳

and run the social media all by myself,

整個社會媒體都是我自己一人在運作

but it's not lonely,

但我並不孤獨

because Vsauce has more than 2 million subscribers,

因為Vsauce 有超過2百萬訂閱者

and every month, my videos are seen by more than 20 million people.

每個月我的影片

都有超過2千萬的人觀看

Yeah.

沒錯

(Applause)

It's very exciting.

很令人興奮呢

I've found that asking a strange question is a great way to get people in,

我發現問一個奇怪的問題

是個讓大家感興趣的極好辦法

not just people, but fans.

不單只是吸引人, 更要吸引粉絲

And fans are different than just viewers or an audience,

粉絲們和普通觀看者、收聽者不同

because fans want to come back.

因為粉絲還想回來

They subscribe to you on YouTube

他們在YouTube上訂閱你的頻道

and they want to watch everything you've made

他們想看你製作過的所有內容

and everything you plan to make in the future

和未來將要製作的所有內容

because we are curious people

因為我們是好奇心強的人

and sparking curiosity is great bait.

而激起好奇心是個極佳的誘餌

It's a great way to catch a human.

是抓住一個人注意力的極佳方式

And once you've caught them,

而且一旦你抓住他們的注意力

you have this captive audience that you can,

你就有了一個被俘獲的聽眾

with the goal in mind of answering the question,

帶著回答問題的目標

accidentally teach a lot of things to.

你就能意外地教給他們很多東西

So, let's take a look at some of my videos.

所以, 我們來看看我做過的一些視訊

Here are eight of them.

這裡有8個

But down here in the lower-right corner,

但在右下角這個地方

"鏡子是什麼顏色的?"

"What Color is a Mirror?"

When people see that,

當人家看到這個

it's very difficult not to click, because you think,

就很難不去點擊. 因為你們在腦子裡想:

"Come on, are you serious?

"拜託, 你是認真的嗎?

How could you possibly answer that question?"

你怎麼可能答出這種問題呢?"

Well, so far, 7.6 million people have watched

然而，到目前為止，有760萬人們點閱過

this five-minute video about what color a mirror is.

這個長達五分鐘的視訊，描述有關於鏡子是什麼顏色的視訊。

And in that episode, I answer the question

在那一集影片中，我回答了這個問題

and I get a chance to explain what would normally be kind of dry topics:

而我也有機會解釋

一些正常情況下有點枯燥的話題:

optics,

光學

漫射和鏡面反射

diffuse versus specular reflection,

how light works, how light works on the retina,

光如何傳播

光在視網膜上如何映射

and even the etymology of color terms

甚至是有關顏色的術語的來源與演變

like white and black.

比如說白色和黑色

Okay, spoiler alert:

好吧, 透露一下影片的內容:

mirrors are not clear,

鏡子不是透明的，

they are not silvery,

他們也不是銀色的

like they're often illustrated.

他們經常被說成的是這樣子的

Mirrors, technically speaking,

鏡子，實際上來講,

are just a tiny, tiny, little bit ...

是有一點點, 就一點點的

green.

綠色

You can demonstrate this by putting two mirrors next to each other,

要證明這一點

你可以把兩面鏡子面對面的擺著

facing so they reflect back and forth forever.

這樣一來

兩面鏡子會無窮盡的來回反射

順著無窮盡的反射看下去

Look down that infinite reflection, and it will get dimmer,

它會變得越來越暗

because some light is lost or absorbed every time,

因為每次反射都有一部分光散失或被吸收了

but it will also become greener,

同時它也變得越來越偏綠色

because green light,

因為綠色光

that is light of a wavelength that we perceive as green,

也就是說

我們一般認知為綠色那種波長的光

is best reflected by most mirrors.

是被大部分鏡子反射得最好的光

Okay, so, how much does a video weigh?

好吧，那一個影片到底有多重呢?

Well, when you stream a video onto your computer,

當你用電腦觀看一部影片時

that information is temporarily stored

這些影片的資訊

using electrons.

被利用電子方式暫時儲存

And the number of electrons on your device won't actually increase or decrease.

而你設備上的電子數量

實際上不會增加或減少

But it takes energy to store them in one place,

但是，把它們儲存在一個特定地方是要耗能的。

and, thanks to our friend Albert Einstein,

而我們知道,

托我們的朋友愛因斯坦的福

we know that energy and mass are related.

能量和質量是相關的

Okay, so here's the thing:

好, 所以事情是這樣子:

let's say you're watching a YouTube video

假設你在看一部Youtube影片

用相當高的解析度,720p

at a really nice resolution, 720p.

Assuming a typical bit rate,

假設是典型的位元速率

we can figure that a minute of YouTube video

那麼我們可以算出來

Youtube影片一分鐘

is going to need to involve about 10 million electrons on your device.

你的設備大約需要用到1千萬的電子

把這些電子的個數

Plugging all those electrons and the energy it takes to hold them

和需要把這些電子放在正確位置上

in the correct place for you to see the video,

讓你觀看影片的能量

代入到公式裡,

into that formula,

我們能算出來

we can figure out that one minute of YouTube video

一分鐘的Youtube視訊

increases the mass of your computer

使你電腦的重量

by about 10 to the negative 19th grams.

增加了10的-19次方公克

Written out, it looks like this.

把它展開寫出來, 就是這樣.

(Whistle)

That's like nothing.

這沒多少

You could call that nothing, and you wouldn't really get in trouble,

你可以說它根本和沒有一樣

也不會有什麼問題

因為我們到目前為止發明出的

because the best scales we've ever invented

that we could try to use to actually to detect that change

能被用來

檢測出重量變化的最小的刻度

are only accurate to 10 to the negative 9th grams.

只能精確到10的-9克

So, we can't measure it,

所以我們測不出來,

but we can, like we just did, calculate it.

但是我們能用剛剛的方法

計算出來這個增加的數值

And that's really cool because when I was a kid,

有一件很酷的事

在我還是小孩的時候

my school had two shelves of science books.

我們學校有兩書架的科學書籍

That was really cool,

這真是一件很酷的事

but I read all of them within, like, two grades,

我在差不多兩個學年之內就把它們全部讀完

and it was hard to get more books

而且很難再獲得更多的書了

因為書很重

because books are heavy, you need space for them

你需要找地方存放它們

and moving books around is tougher than what we can do today.

而把書搬來搬去

比我們現今要難上許多

With numbers that small,

就通過這麼小一個數字,

I can fit thousands of books

我就可以在我的個人電子書裡

on my own little personal electronic reader.

塞進上千本書

I can stream hours and hours

我可以看上幾小時

and days and days of YouTube video

甚至幾天的Youtube影片

without my computer ever getting measurably heavier.

我的電腦都不會有什麼察覺得出來的重量變化

當資訊變輕的時候,

And as information becomes that light,

it becomes a lot more democratic,

它也變得更大眾化

meaning that more teachers

也就是說比原來更多的老師

and presenters and creators and viewers than ever before

演講者

創作者

和觀看者

can be involved.

可以共同參與

Right now, on YouTube,

現在在Youtube網站上

there is an explosion of content like this happening.

就有像這樣的

資訊大爆炸

The three Vsauce channels are down there in the corner.

三個Vsauce頻道

就在角落這裡

But everyone else, all together, collectively,

但是其他的每一個人

加在一起, 集合在一起

their views dwarf what I can do alone

他們的觀看數量使我一個人的能力

or with the people that I work with,

或是我共事的人們的能力相形見絀

and that is really, really exciting.

而這真是非常, 非常令人興奮的

It turns out that tapping into people's curiosity

抓住人們的好奇心

and responsibly answering their questions

並負責任的回答他們的問題

is a brilliant way to build fans and an audience

是個增加粉絲, 聽眾和觀眾

and get in viewers.

的極佳方法

It's even a great way for brands and companies

這甚至是品牌和公司

to build trust.

建立信譽的好方法

So, calculating the weight of a video

所以說計算一個視訊的重量

is kind of a funny question,

好像是個滑稽的問題,

but I cannot wait to see what we ask and answer next.

但是我等不及想要看到

我們下一個提問與問題的解答是什麼

As always, thanks for watching.

一如往常, 謝謝觀看

(Applause)