TEDActive 2013
Michael Stevens: How much does a video weigh?
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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.
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?" Full bio
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 are awesome.
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Vreće za sedenje su fenomenalne.
Ali, vidim tamo nekoliko ljudi
00:19
But I see a few people out there
who are standing,
who are standing,
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koji stoje,
00:23
we've got some over here,
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ima nekih i ovde,
00:24
and standing takes more
work than lounging.
work than lounging.
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i stajanje zahteva
više truda od ležanja.
više truda od ležanja.
Koristeći podatke sa interneta
organizacije "Živeti jako"
organizacije "Živeti jako"
00:29
Using the Live Strong
Organization's online database
Organization's online database
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00:32
of weight loss resources,
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o metodama za gubljenje težine,
00:35
you can calculate
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možete da izračunate
00:36
that by the time I'm done
with this speech,
with this speech,
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da kada završim ovaj govor,
00:38
those of you who are standing
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vi koji stojite ćete
00:40
will have burned 7.5 more calories
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sagoreti 7,5 više kalorija
od vas koji leškarite.
00:44
than those of you who are bean-bagging it.
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00:47
(Laughter)
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Okej, evo pitanja,
00:48
Okay, here's a question,
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00:50
speaking of weight loss,
specifically weight,
specifically weight,
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govoreći o gubitku težine,
preciznije o težini,
preciznije o težini,
00:53
this speech is live.
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ovaj govor ide uživo.
00:54
I'm actually here in front of you guys,
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Ja sam upravo ovde ispred vas,
svi smo zajedno ovde.
00:56
we're all here together.
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Ali, ovaj govor se snima
00:57
But this speech is being recorded
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00:59
and it will become a video
that people can access all over the world
that people can access all over the world
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i postaće video
kojem ljudi širom sveta
mogu da pristupe
mogu da pristupe
preko kompjutera,
01:03
on computers, mobile devices,
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mobilnih uređaja,
01:05
televisions.
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televizije.
01:06
I weight about 190 pounds.
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Ja sam težak oko 86 kilograma.
Koliko će video biti težak?
01:11
How much will the video weigh?
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Takva pitanja
01:18
Asking questions like that
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su tema svake nedelje
na mom kanalu "Vsauce."
na mom kanalu "Vsauce."
01:20
is what I do every week
on my channel Vsauce.
on my channel Vsauce.
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Poslednje dve godine
01:23
For the last two years,
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postavljam veoma zanimljiva pitanja,
01:24
I have been asking really fun questions,
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01:26
mind-boggling questions,
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zapanjujuća pitanja,
01:28
and approaching them
as sincerely as I can,
as sincerely as I can,
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i pristupam im
najiskrenije što mogu,
01:31
celebrating scientific
concepts and scientists.
concepts and scientists.
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slaveći naučne koncepte i naučnike.
01:34
And I research and write
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I ja istražujem
i pišem
01:36
and produce and host
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i stvaram,
vodim,
01:37
and edit and upload
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menjam
i postavljam
01:38
and run the social media all by myself,
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i sam vodim društvene mreže,
01:40
but it's not lonely,
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ali, nije samotno,
01:42
because Vsauce has
more than 2 million subscribers,
more than 2 million subscribers,
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jer "Vsauce" ima
preko 2 miliona pretplatnika
preko 2 miliona pretplatnika
01:45
and every month, my videos are seen
by more than 20 million people.
by more than 20 million people.
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i svakog meseca, moje snimke vidi
više od 20 miliona ljudi.
01:50
Yeah.
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Da.
01:52
(Applause)
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01:54
It's very exciting.
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Veoma je uzbudljivo.
01:55
I've found that asking a strange question
is a great way to get people in,
is a great way to get people in,
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Shvatio sam da su čudna pitanja
sjajan način da privučete ljude,
02:01
not just people, but fans.
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ne samo ljude, nego fanove.
02:03
And fans are different
than just viewers or an audience,
than just viewers or an audience,
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A fanovi se razlikuju
od gledalaca ili publike
od gledalaca ili publike
jer fanovi žele da se vrate.
02:06
because fans want to come back.
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02:08
They subscribe to you on YouTube
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Oni te prate na Jutjubu
02:11
and they want to watch
everything you've made
everything you've made
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i žele da vide sve što napraviš
i sve što planiraš
da napraviš u budućnosti
da napraviš u budućnosti
02:13
and everything you plan
to make in the future
to make in the future
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jer mi smo radoznali ljudi
02:15
because we are curious people
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02:18
and sparking curiosity is great bait.
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i pobuđivanje radoznalosti
je sjajan mamac.
je sjajan mamac.
02:23
It's a great way to catch a human.
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To je sjajan način da namamite čoveka.
02:26
And once you've caught them,
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I jednom kad ste ga uhvatili,
dobijate tu očaranu publiku,
koju možete,
koju možete,
02:27
you have this captive
audience that you can,
audience that you can,
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02:31
with the goal in mind
of answering the question,
of answering the question,
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sa namerom da odgovarate na pitanja,
slučajno naučiti mnogo toga.
02:33
accidentally teach a lot of things to.
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02:36
So, let's take a look
at some of my videos.
at some of my videos.
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Hajde da pogledamo
neke od mojih videa.
neke od mojih videa.
02:39
Here are eight of them.
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Ovde ih je osam.
02:41
But down here in the lower-right corner,
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Ali, ovde u donjem desnom uglu,
"Koje boje je ogledalo?"
02:43
"What Color is a Mirror?"
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02:45
When people see that,
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Kada vidite to,
02:46
it's very difficult not to click,
because you think,
because you think,
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Teško je da ne kliknete, jer mislite:
"Ma daj, ozbiljno?
02:49
"Come on, are you serious?
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Kako bi uopšte mogao
da odgovoriš na to pitanje?"
da odgovoriš na to pitanje?"
02:50
How could you possibly
answer that question?"
answer that question?"
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Do sada je 7,6 miliona ljudi pregledalo
02:53
Well, so far, 7.6 million
people have watched
people have watched
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02:58
this five-minute video
about what color a mirror is.
about what color a mirror is.
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ovaj petominutni video o boji ogledala.
03:00
And in that episode, I answer the question
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I u ovoj epizodi ja odgovaram na pitanje
i imam priliku da objasnim
03:02
and I get a chance to explain
what would normally be kind of dry topics:
what would normally be kind of dry topics:
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teme koje bi inače bile suvoparne:
03:07
optics,
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optiku,
difuznu i tačkastu refleksiju,
03:08
diffuse versus specular reflection,
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03:10
how light works,
how light works on the retina,
how light works on the retina,
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kako funkcioniše svetlost,
kako svetlost deluje na mrežnjaču,
pa čak i etimologiju naziva za boje
03:12
and even the etymology of color terms
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kao što su belo i crno.
03:14
like white and black.
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Okej, sad ću vam
upropastiti gledanje:
upropastiti gledanje:
03:17
Okay, spoiler alert:
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03:19
mirrors are not clear,
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ogledala nisu čista,
03:21
they are not silvery,
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nisu srebrnasta
03:23
like they're often illustrated.
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kao što se često predstavljaju.
03:24
Mirrors, technically speaking,
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Ogledala su, tehnički govoreći,
samo malim, malim, delićem
03:26
are just a tiny, tiny, little bit ...
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03:29
green.
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zelena.
03:30
You can demonstrate this
by putting two mirrors next to each other,
by putting two mirrors next to each other,
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Ovo možete dokazati
stavljajući dva ogledala
jedno naspram drugog,
jedno naspram drugog,
tako da se ogledaju jedno u drugom
03:33
facing so they reflect
back and forth forever.
back and forth forever.
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beskonačno.
Pogledajte tu beskrajnu refleksiju,
03:36
Look down that infinite reflection,
and it will get dimmer,
and it will get dimmer,
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postajaće zamagljenija,
03:39
because some light is lost
or absorbed every time,
or absorbed every time,
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jer se deo svetlosti svaki put
izgubi ili apsorbuje,
izgubi ili apsorbuje,
03:42
but it will also become greener,
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ali će takođe postajati zelenija,
03:46
because green light,
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jer zelena svetlost,
03:47
that is light of a wavelength
that we perceive as green,
that we perceive as green,
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to je boja talasne dužine
koju mi doživljavamo kao zelenu,
03:50
is best reflected by most mirrors.
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najbolje se reflektuje
kroz većinu ogledala.
kroz većinu ogledala.
03:54
Okay, so, how much does a video weigh?
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Okej, dakle, koliko je težak video?
03:56
Well, when you stream
a video onto your computer,
a video onto your computer,
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Kada pustite video na kompjuteru,
03:59
that information is temporarily stored
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ta informacija se privremeno skladišti
04:01
using electrons.
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pomoću elektrona.
04:03
And the number of electrons on your device
won't actually increase or decrease.
won't actually increase or decrease.
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I broj elektrona na vašem uređaju
se neće zapravo povećavati i smanjivati.
04:08
But it takes energy
to store them in one place,
to store them in one place,
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Ali potrebna je energija
da ih memoriše na jednom mestu,
da ih memoriše na jednom mestu,
04:11
and, thanks to our friend Albert Einstein,
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i mi znamo,
zahvaljujući našem prijatelju
Albertu Ajnštajnu,
Albertu Ajnštajnu,
04:14
we know that energy and mass are related.
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da su energija i masa povezane.
04:16
Okay, so here's the thing:
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Okej, evo o čemu se radi:
04:18
let's say you're watching a YouTube video
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recimo da gledate video
na Jutjubu
na Jutjubu
u stvarno dobroj rezoluciji, 720p.
04:20
at a really nice resolution, 720p.
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04:23
Assuming a typical bit rate,
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Uz tipičan protok bitova,
04:25
we can figure that a minute
of YouTube video
of YouTube video
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možemo da zaključimo
da će za minut videa na Jutjubu
da će za minut videa na Jutjubu
biti potrebno da učestvuje
04:30
is going to need to involve
about 10 million electrons on your device.
about 10 million electrons on your device.
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oko 10 miliona elektrona
na vašem uređaju.
na vašem uređaju.
Sakupljanje svih tih elektrona
04:38
Plugging all those electrons
and the energy it takes to hold them
and the energy it takes to hold them
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i energija potrebna da ih drži
na pravom mestu,
kako biste pogledali snimak
kako biste pogledali snimak
04:41
in the correct place
for you to see the video,
for you to see the video,
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po ovoj formuli,
04:43
into that formula,
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možemo da zaključimo
04:44
we can figure out
that one minute of YouTube video
that one minute of YouTube video
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da jedan minut snimka na Jutjubu
povećava masu vašeg kompjutera
04:47
increases the mass of your computer
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do oko 10^-19 grama.
04:50
by about 10 to the negative 19th grams.
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04:55
Written out, it looks like this.
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Ispisano, to izgleda ovako.
04:57
(Whistle)
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To izgleda kao ništa.
04:58
That's like nothing.
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To je, možete ga nazvati ništa,
05:00
You could call that nothing,
and you wouldn't really get in trouble,
and you wouldn't really get in trouble,
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i nećete zaista imati problema,
jer najbolji merači
koje smo ikad izmislili,
koje smo ikad izmislili,
05:04
because the best scales
we've ever invented
we've ever invented
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05:07
that we could try to use
to actually to detect that change
to actually to detect that change
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koje bismo mogli da iskoristimo
da stvarno detektujemo takvu promenu,
05:10
are only accurate to 10
to the negative 9th grams.
to the negative 9th grams.
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su precizni samo do 10^-9 grama.
Dakle, ne možemo da izmerimo,
05:13
So, we can't measure it,
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05:15
but we can, like we just did,
calculate it.
calculate it.
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ali možemo,
kao što upravo i jesmo,
kao što upravo i jesmo,
da izračunamo.
05:17
And that's really cool
because when I was a kid,
because when I was a kid,
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I to je stvarno super,
jer kad sam bio dete,
05:20
my school had two shelves
of science books.
of science books.
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moja škola je imala dve police
sa naučnim knjigama.
sa naučnim knjigama.
05:25
That was really cool,
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To je stvarno bilo super,
05:26
but I read all of them
within, like, two grades,
within, like, two grades,
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ali ja sam ih sve pročitao
za neke dve godine,
za neke dve godine,
05:28
and it was hard to get more books
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i bilo je teško nabaviti još knjiga,
jer knjige su teške
05:30
because books are heavy,
you need space for them
you need space for them
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i potreban vam je prostor za njih
i prenošenje knjiga je mnogo teže
05:33
and moving books around is tougher
than what we can do today.
than what we can do today.
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od onoga što danas možemo.
Sa tako malim brojevima,
05:35
With numbers that small,
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05:37
I can fit thousands of books
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mogu da smestim hiljade knjiga
05:39
on my own little personal
electronic reader.
electronic reader.
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na moj mali e-čitač.
05:43
I can stream hours and hours
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Mogu da puštam sate i sate
05:45
and days and days of YouTube video
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i dane i dane snimaka na Jutjubu
05:47
without my computer
ever getting measurably heavier.
ever getting measurably heavier.
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a da moj kompjuter
ne postane merljivo teži.
ne postane merljivo teži.
I kako informacija postaje tako laka,
05:52
And as information becomes that light,
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05:54
it becomes a lot more democratic,
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postaje i mnogo više demokratska,
u smislu da više nastavnika
05:55
meaning that more teachers
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05:58
and presenters and creators
and viewers than ever before
and viewers than ever before
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i predavača
i stvaralaca
i gledalaca, više nego ikada,
06:03
can be involved.
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može biti uključeno.
06:06
Right now, on YouTube,
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Trenutno se na Jutjubu
dešava eksplozija sadržaja
06:07
there is an explosion
of content like this happening.
of content like this happening.
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kao što je ovaj.
06:10
The three Vsauce channels
are down there in the corner.
are down there in the corner.
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Tri "Vsauce" kanala
su tamo dole u uglu.
Ali svi ostali, zajedno,
06:13
But everyone else,
all together, collectively,
all together, collectively,
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kolektivno,
njihovi pregledi mogu da umanje
ono što ja radim sam
ono što ja radim sam
06:15
their views dwarf what I can do alone
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06:18
or with the people that I work with,
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ili sa ljudima sa kojima radim,
06:20
and that is really, really exciting.
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i to je stvarno, stvarno uzbudljivo.
06:22
It turns out that tapping
into people's curiosity
into people's curiosity
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Izgleda da golicanje ljudske radoznalosti
06:25
and responsibly answering their questions
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i revnosno odgovaranje na pitanja
06:28
is a brilliant way to build
fans and an audience
fans and an audience
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je sjajan način da pridobijete
fanove i publiku
fanove i publiku
06:32
and get in viewers.
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i privučete gledaoce.
06:33
It's even a great way
for brands and companies
for brands and companies
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To je čak i sjajan način
da brendovi i kompanije
da brendovi i kompanije
06:36
to build trust.
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izgrade poverenje.
Dakle, računanje težine videa
06:38
So, calculating the weight of a video
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06:43
is kind of a funny question,
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je nekako zabavno pitanje,
06:45
but I cannot wait to see
what we ask and answer next.
what we ask and answer next.
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ali ja jedva čekam da vidim
šta ćemo sledeće
da pitamo i odgovoramo.
da pitamo i odgovoramo.
06:51
As always, thanks for watching.
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Kao i uvek, hvala na gledanju.
06:53
(Applause)
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ABOUT THE SPEAKER
Michael Stevens - YouTube educatorMichael 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.
Michael Stevens | Speaker | TED.com