Watch The World Turn

To start learning for free, and to be among the first 200 people to sign up to get 20% off your subscription, check out: brilliant.org/kurtis
Huge thanks to the University of Puget Sound for their help in making this video possible.
Here is a look behind the scenes for this video: • 28 Hours With a Pendul...
Foucault Pendulums probably are my favourite science experiment - how amazing is it that someone figured out how to watch the world turn just by watching a pendulum for a long time?

[@ScopeofScience]

If you liked this video, please give it a 👍. That would really help me out!

[@slimeking101]

This video was so interesting I showed it to my whole family

[@brianfromireland]

Amazing work 🙌

[@tigerkill420]

👍 I like how you added more plants after your channel blew up. Edit: did you name the other plants?

[@ScopeofScience]

I let the community suggest names and vote. You named it: Tom Scott

[@brandtmagolon633]

Why doesn’t the top of the pendulum rotate with the earth?

[@WangleLine]

Some people just want to watch the world turn. That someone is Kurtis Baute.

[@MedlifeCrisis]

I came here specifically to make this joke you joke thieving precog

[@stevethea5250]

1on1 tutor/mentor to boost her confidence.

[@DRMadeIt]

Medlife Crisis I came here to make the same comment and when I saw it I came to make the same reply. Who’s the joke stealing precog? 😒

[@AVERYhornyMrDinosaur]

@@stevethea5250 Did you just assume the gender? THAT IS NOT OK *_YOU WILL FEAR ME, FOR I ARE A 15 TON FEROCIOUS DINOSAUR!!! WRAAAARRRR!!!!_*

[@stevethea5250]

@@AVERYhornyMrDinosaur so cute!!

[@Jeteye2844]

Lets decompress the video for a minute. At 3:07 Kurtis appears in frame with a clock in the background. The time being shown as around 5:50 a.m. At 3:10 Kurtis leaves frame with the clock showing the time of around 6:15 a.m. That is around 25 mins of real world time needed to capture enough frames for a 3 sec scene. Just think about that every time Kurtis appears on screen doing a little skit. It took him 10 of mins to hours of siting in place, making small minuet movements to give the sense of motion in the final product. On top of this there is the very small window to act out each scene. He may have had 28 hours in total to shoot everything but when scenes take hours to shoot, you don't get many do overs. He had to be on-point almost every time with near zero mistakes. That is an amazing level of planing and foresight. This is dedication to a demonstration if I've every scene it. A truly amazing video sir. I salute you.

[@ScopeofScience]

Thanks! Yeah, whenever I realize I need to write a video script using spreadsheets to get the timing of each word and action right, that's when I realize I've started working on a stressful project lol

[@iainbradford4254]

@@ScopeofScience I expect the band OKGO is a favorite of yours with their mathematically perfect music video planning. You should get in contact with them, they are always after new ideas.

[@AliAlhussaini]

Flat earthers never been so triggered

[@schrodinger3467]

Flerfers won't be able to wrap this proper scientific experiment around their stupid heads...

[@danielb3573]

My flat earther jokes always fall flat

[@doaa7941]

Can we just call them morons?

[@BGRANT777X]

@@doaa7941 that's just what "they" want you "to" think about them! see I'mz smart!

[@rawvid9065]

Wait this doesn't prove Earth is a sphere, but it only proves that Earth rotates, the curvature of Earth can be proved by, the well experiment

[@InnocentCatfaces]

Unbelievable quality, you can truly observe the amount of work put into this, thank you Kurtis!

[@stevethea5250]

The way he pronounces Pendulum make me feel uneasy... for the first time hearing that way.

[@SewerTapes]

As someone who has done minor stop motion projects, I understand the staggering amount of work on display here. This video is absolutely brilliant. Well done.

[@durborough8484]

In the museum for technology in Berlin there is a Foucault pendulum that tips over a small wooden block every few hours. So I knew the experiment already. But: I have never seen it in the way you depicted it! Your version is even more impressive! Thank you very much for your hard work!

[@ScopeofScience]

Thanks so much :) Yeah, its always made me sad that people don't seem to See how incredible this experiment is... its just too slow to really visualize. So, I made this :)

[@SuperSiggiboy]

Here at the University of Technology and Sciences (NTNU) in Trondheim, Norway, we also have a pendulum. It has lots of small metal pegs, and it kicks over one roughly every 15 minutes, making a great jarring sound throughout the building! Our pendulum also has the electromagnet at the bottom, it is visible and has an indicator LED that shows when it is active. A short video of it I found: kzbin.info/www/bejne/aJ_SYYSYfpZrjrs

[@inesef]

Siggen. Thats amazing video, why so short?

[@bhaggen]

We have one here at the Griffith Park Observatory (34°N) that knocks over bowling pins

[@NoWarInBaSingSe]

He put a high amount of work into this, This is why I hate the people who disliked this video.

[@connierule3902]

That was a lot of work! I'm honestly really impressed that you were switching frame after frame after fram only in the time it takes for the pendulum to move back and forward. And over the course of 32 hours?! Honestly amazed. Good work.

[@Azivegu]

well at 30 fps, he did have 16 seconds between each frame, but still, it must have been a lot of work xD

[@Tallone55]

@@Azivegu He explained in his previous video that he used a detection mechanism rather than a timer to determine when to take each frame.

[@dprssv2329]

Videos like these need to be in Trends #1

[@ukcroupier]

That's the most impressive video I've ever seen on youtube.

[@golden-sun]

same.

[@jesuschristfirst5775]

If the ground rotated then helicopters would not stay in the same spot while hovering in the air. Research flat earth from a real flat earthers perspective. Watch eric dubay, odd tv, taboo conspiracy...

[@ukcroupier]

@@jesuschristfirst5775 I would explain this to you but from what I see of flat earthers they won't listen.

[@Corporis]

That Brilliant logo reveal in the beginning was...brilliant

[@ScopeofScience]

I see what you did there....

[@KhAnubis]

This was amazing (as usual). At first, I thought it was going to be just the timelapse, but man was I wrong!

[@emrefifty5281]

Underrated Channels meeting in the Comment Section. Your channel is awesome KhAnubis.

[@sabrinakelley-brooks4905]

I used to go to University of Puget Sound, and the most relatable part of this video is how you slept on the benches next to the pendulum. I've done that too many times to count.

[@timothysstuffintros503]

Your channel is sooo good! How do u only get 10k views

[@thevictor180]

cause this video literally just got uploaded genius

[@viranko7530]

Thanks for making this video. If Foucault had lived somewhere in the equator he would have thought his experiment had failed

[@WeldNotes]

Great results!

[@ScopeofScience]

Thanks!! I'm definitely happy with how it turned out :)

[@Taikamuna]

Imagine doing this and then someone comes and touches the pendulum

[@pimp2570]

youd have to watch how to get away with murder

[@nanarivet3291]

That would trigger me

[@jeffreystarnes9500]

I’m glad you explained how they keep this thing going and going and going.

[@ScopeofScience]

You bet! I think people hear that there is an electromagnet and think it's all trickery, when really they just don't understand that Newton's Laws would make it a short show otherwise.

[@Roboardo]

Thank you. I didn't know i needed this.

[@ScopeofScience]

You are so so welcome :D

[@snegelstenen]

Wonder how flat earthers explain this? Paid actor? Reasons? Perspective? Oh, of course. We're on a fresbee, and everyone knows a fresbee is a spinning disc. Awesome job by the way 👍

[@anandsuralkar2947]

This guy and pendulum is a CGI by nasa

[@steelbee4282]

My guess is they'd say any Foucault pendulums on display are artificially kept in that motion because of illuminati and blah blah

[@user-si5fm8ql3c]

@@steelbee4282 They would probably Explain it with Hidden Electromagnets

[@route2033]

Why don't you get off your lazy globetrotter butts and actually find out what is going on. Or you can believe you live on a merry go round cartoon ball. Your choice

[@route2033]

I'll believe God's word over nonsense pendulums ran on electromagnetism. Thanks for your video Pauly Shore

[@CattoRayTube]

Your stop motion solution worked so well! Great video and explanation :)

[@solunetic530]

I respect you dude. No one would waste this much time for us. Thanks, your a good soul.

[@ScopeofScience]

For Science!

[@globalko]

Your science videos are the best on youtube by far

[@theobits-obworld1363]

Congrats on vid - a lot of work put in that some other KZbins just don’t.🏆

[@ScopeofScience]

Thanks!

[@aidanwansbrough7495]

That is brilliant!! The quality of the the video is amazing :)

[@conanichigawa]

You deserve more views, more subscribers, and more plants.

[@EvanBoyar]

I went ahead and did the math with too many significant figures: Pendulum day = sideral day/sin(latitude) Pendulum day = 23.9344699/sin(47.263655°) Pendulum day= 32 hours 35 minutes 12.37 seconds

[@37rainman]

+Evan: Yes, actually it is "too many sig figs", and many of your figs are not sig. (-; Because the pendulum rotation period will be slightly affected by the fact that the earth is revolving around the sun. Also for the fact that the connection to the ceiling cannot be entirely frictionless

[@MCMaterac]

@@37rainman Exactly. Btw, has anyone tested the pendulum at the Equator? If my math is right, that'd give a drift of ~1° per 2.5 days from the Earth's revolution. Very slow, but with a pendulum like one in this video should be detectable I suppose.

[@37rainman]

@@MCMaterac First, the earth moves just a tad under 1 deg each day, not each 2.5 days. But really, you are not visualizing this situation very well if you think that situation could be demod on the equator. The fact is, it could easier be demod by a pendulum on the pole, if it could be demod at all. But, to go further: At, say, i degree above the equator, the rate of turn would be very close to 15 deg x cos(90deg - 1 deg) = 0.261 deg per day. By your reasoning, one could use a pendulum to demo that in 4 days the pend would move 1 deg. I can assure you that at that close to they equator you will demo nothing at all. Except the fact that a pendulum cannot demo rotation that close to the equator. The rotation of earth will not overpower the several other influences. And finally, if revolution can be demod, it IS demod. If it wasnt revolving, the period would be 24 hrs. It is revolving, and the period is about 23 hrs 56 min. Again, can a pend demo that small difference?? Maybe. Might be a subject to research, but i doubt it.

[@MCMaterac]

​@@37rainman Well... it's the other way round: ~23h 56 min (~0.99727 days) is from rotation alone. Any star other than the sun makes the full circle in that period. 24h is rotation + revolution. A not so important detail, but that's how it is. Edit: Ok, I've wanted to point out You forgot to consider the axial tilt. My calculation goes like: the period for equator is 8766.15 h / sin(0+23.44°) ≈ 22 037 h per whole rotation, so ~61.21 h per 1°... ... and wanted to point out Your "just a tad under 1 deg each day" rate would be correct for the axial tilt of 90°, however, I've just realized that would require one side of the Earth locked at the sun (e.g. the South Pole always facing it directly). The calculation I made above would be correct if the Earth's axial tilt was constant from the sun's perspective (which of course isn't the case - that'd mean no seasons and constant day on a one pole / constant night on the other). The tilt doesn't change for an outside observer, so the pendulum can't be affected by it.

[@punterlotek7460]

Can we just talk about how he wasn't scared that he would accidentally touch the pendulum and break the whole cycle?

[@kittybeans8192]

You Spin Me Right Round Baby Right Round Like A Foucault Pendulum Baby Right Round Round!

[@Juanoodi]

Lmao. This deserve likes. OoooooohooohohoohoOOOhoooHooooHOOOO

[@jeremiah11111111]

This is the type of great, educational content, needed on MY planet. ✌👽

[@kerjalong]

U spen a night there just to watch the pendulum move. ? Bro ur a legend

[@Dracopol]

In Grade 9 in Canada I built a Foucault Pendulum with an electromagnet pulling the pendulum to the center to keep it swinging (but that needed adjustment to go neither too strong in swing or too weak). It was only four feet high! The long-arc and heavy weight versions last long enough.

[@nicolaspohlmann8934]

This is a channel that deserves 1Mio. Subs for sure! Great job!

[@aschneider2013]

Nicolas Pöhlmann He will eventually reach the 1 mio. Not so long ago he had a low number of subscribers. It is growing! His videos are the best. Keep it up.

[@ClimateAdam]

what an amazing demonstration/explanation/time lapse! so much amazing information.

[@malkauczok66]

A massive thumbs up KURTIS, well done, its clear you enjoy making these videos, please keep them coming, cant wait till your next one....greeting from the UK.

[@TrailChaser]

Great Video. Best I've seen in a while!

[@khem3275]

Thank you Uncle Science for showing us we're on a large spinning rock. Btw that's a noice hoodie 👌

[@ScopeofScience]

Uncle Science. Its weird, but I kinda like that...

[@khem3275]

@@ScopeofScience good because you're now my uncle suRPRISE 💝

[@harishakula82]

I appreciate your patience and the effort you put into making this video. Great job, please keep doing it. I will support you. Thankyou.

[@LeahandLevi]

Dude I'm hyped that we're going to be working together soon! But I'm also just excited that I get to be a part of one of these crazy random projects with you. Let's find something giant and surprising to incorporate ok? lol

[@ScopeofScience]

Ditto Levi! In so so into it :)

[@big_man_]

this was a really solid video. knowing the effort you put into this is appreciated

[@jesuschristfirst5775]

If the ground rotated then helicopters would not stay in the same spot while hovering in the air. Research flat earth from a real flat earthers perspective. Watch eric dubay, odd tv, taboo conspiracy...

[@NicodeZambiasi]

I'm so glad you decided to go for the KZbin career!! Thank you Kurtis. I love this kind of videos

[@ScopeofScience]

Thank YOU!

[@justindoan4258]

At 480x speed, can't imagine how long all of those graphics took to show, amazing job!

[@ScopeofScience]

A really... really long time. Thanks!

[@socks7545]

This is an incredible video, thank you. I hope this reaches more people, that would genuinely appreciate this.

[@RysttleWinters]

I don't usually leave comments but this video is really good and I enjoyed watching it! Thanks for making this!

[@cavemann_]

You seem to have had a lot of fun there, man. That's really an amazing video!

[@cobain_92]

Discovered you through my recommended, watched all your videos and this is the first one that comes out since I subscribed, so hell yeah!

[@lostinc6791]

Standing ovation! Bravo sir!

[@LarrysJournal]

Sir, that was incredible. You earned yourself a subscriber ❤️

[@franteryda4730]

Wow, I am glad I found this channell some weeks ago. Your content si awesome! And that timelapse was incredible. Can't think of the ammount of work it took. Thank you

[@ScopeofScience]

Thanks so much. Glad to have you here :)

[@franteryda4730]

@@ScopeofScience Cheers from argentina!! 🇦🇷

[@zachattack7]

There's one at Griffith Observatory that knocks over dominoes so you can visualise the movement. They also have Nicola Tesla's Tesla Coil and even fire it up for demonstrations. Sooo cool!

[@ScopeofScience]

I hope they just call it Telsa's Coil ;)

[@zachattack7]

@@ScopeofScience lol! Redundancy overload eh? XD

[@StefanoRevello]

I remember two such pendulums at two science museums. One kept track of the Earth's rotation by knocking down pins on the the outer circumference, the other tracing it's path on sand.

[@IrishAnonymous01]

If you could have gotten a plan view of this you could rotate the video to imitate the earths movement. Loved the video though very informative!

[@ScopeofScience]

Wanted to do exactly that, but one of my two cameras just stopped working with my timer about an hour into the shoot, so it became a scramble to get everything with just one camera :(

[@IrishAnonymous01]

Kurtis Baute No biggy. Great minds think alike 👍🏻

[@paulkepshire5056]

High quality content, stunning visual effects, and a great explanation? Yes, please! Your hard work really shines through this vid. Keep up the good work!

[@charanth182]

Thanks Kurtis! That was fun to watch.

[@meinderth8240]

This is awesome. You put a lot of effort in this. Thanks a lot.

[@JJJthebest]

Damn it dude. This is just too good! The explanation, the stop motion effect, everything! So glad Tom introduced me to your channel!

[@jesuschristfirst5775]

If the ground rotated then helicopters would not stay in the same spot while hovering in the air. Research flat earth from a real flat earthers perspective. Watch eric dubay, odd tv, taboo conspiracy...

[@MedlifeCrisis]

Kurtis!! This was absolutely incredible. I watched your previous one about setting this up, I was expecting some wobbles but it's FLAWLESS. You got the shots so perfect. And all the stop motion stuff with you with totally unexpected and very fun. I am blown away. Phenomenal! And...100k in a few hours, congrats!

[@ScopeofScience]

Yeah, all my original tests were using timers, and that always produced a nauseating wobble. So I'm really really happy with how it turned out :) Thanks pal!

[@stewved]

Great to see Tom Scott doing well, and I proper LOL'd at your 'animations'! Thank you for the time and effort :D

[@jackroymeyer6336]

This video is so incredible. Thank you a lot for the work you put in it.

[@deadbox2003]

If world is spinning, then I am spinning. Yay!

[@TheNakedrat]

yes you are

[@JaMaMaa1]

Nice.

[@SMac-bq8sk]

Very well done. Your patience in making this video is admirable.

[@BeeGameDev]

Keep being amazing kurtis!

[@Youcanscienceit]

Not enough people know about Foucalt and that it wasn't until 1851 that society at large began accepting that the earth really turned. I keep a print of the sketch done for the 1851 news paper in my home's entry way to talk about this. I also think that the derision towards "flat earthers" might be tempered if people really thought about how counter-intuitive our modern, spherical, spinning, heliocentric understanding is and that it took serious experiments and a long time to figure it all out.

[@ScopeofScience]

That is so cool. Sounds like the kind of print I would want to have in my house! The flat earth thing is a can of worms I've not yet had enough coffee to get into this morning... but I will say I think the main thing we need to do differently is approach these people with compassion. Calling them names seems to be the go-to approach, and it is making everything worse :(

[@wierdalien1]

Its not really that counter intuitive

[@massimookissed1023]

Proving the Earth spins took us a lot longer than proving it's not flat.

[@susanne5803]

@@ScopeofScience First: Thank you so much for a mind-blowing video! Second: A lot of flat earthers deserve compassion and patience and educational experiments. - But some seem to have an agenda by spreading it by all means and with a lot of money. And I don't understand what that agenda could be. Take as much time as you need for your next video - I get so addicted to this quality!

[@dnomyarnostaw]

Nah. They deserve derision. 100 years ago, we didnt have five hundred KZbin videos, a decent education system, and a worldwide navigation system. If someone insists on a Flat Earth these days, they are being wilfully ignorant

[@fanfare100]

I appreciate this video. I've been trying to explain this to people for years and you found a way to clearly illustrate it.

[@shashankranjan3790]

Thank you so much for your efforts.. Kurtis

[@haia3007]

Really thanks a lot for making these videos man. I am greatly inspired by your proving the earth is round with your bike and sealing yourself in a jar videos. It inspired me to love science more than I thought and you showed me the cool things even a normal person with a budget can do to do their own science without the need for a lab and expensive equipment. Really thanks a lot.

[@djkgfg]

Your demeanor, writing, and video editing make your channel my absolute new favorite. Your video about life tracking changed my life. Thank you for creating the content that you do. Love it. Peace and love, friend.

[@ScopeofScience]

Well that is so motivating. Thank you MrMicah :) Hope you're having a great week.

[@AtlasPro1]

Uh oh we're getting close to 100k here

[@ScopeofScience]

Wow! I just took a look over at your channel for the first time in a month or so, and it has also completely exploded. Any idea what caused the flood? Congrats! :D

[@MrTalhakhan01]

Buddy I appreciate the time and effort that was put to make this single video. Kudos!

[@danielduncan6370]

I’am so happy I found this channel! Such interesting videos.

[@zach7128]

Oh my gosh I can barely imagine the effort it must have taken to make this video. Absolutely brilliant work

[@geetarani530]

Oh man you are a genius and your work is great. You put so much of your time and hardwork for science and that thing is really appreciable. Keep the good work up 😎

[@FlippingPhysics]

This is an awesome video! I am very impressed.

[@androidwalle4932]

The effort is unbelievable, if you think it through. Danke, Mann.

[@deathhound9400]

how many times did you accidentally touch it

[@Noah-fx4cm]

0, it would've been obvious

[@kaselier1116]

We have one at a local museum that I saw a few years back. When I saw that I was like "sure whatever". But seeing this insanely well produced video i'm all for this things! Great stuff man.

[@insideman7501]

Insanely well made video! I hope this blows up!

[@ElTallerDeTD]

This is awesome, great explanation!

[@varunmehta1821]

Wow. I mean really. It's awesome seeing the efforts you put in the video. It's real hard to do things slow and consistent. Big up's to you man.

[@ScopeofScience]

Thanks! Not gonna lie, I'm glad this project is over haha

[@TheSwanies]

We have one of these in our building of exact sciences at the Norwegian University of Science and Technology! In the exhibit there, we have metal poles around the sphere, such that you can see the ball progress since the morning, when someone resets the pins to an upright position. Some times, if you are lucky, you can be walking past as the sphere hits a pin. Fun stuff!

[@cc-bk7do]

This is so much effort. Verry well done! You deserved that like totally

[@pinkyster9384]

definitely worth the wait!

[@joedoe3688]

Science 1 - Flatearther 0

[@RSpudieD]

This is very cool and I give you MAJOR points for actually doing a timelapse and being in it at the same time to tell the story.

[@DankDovahKiin]

you and this video deserve many more views!

[@herchannel1355]

Wow....appreciate your hardworking making this video.

[@googolplexbyte]

So really the pendulum should be fixed in position and the room should move about it, like one of those stabilised videos.

[@classtech3178]

Great job Kurtis! We have a small version of this in a case at one of the entrances to Rood Hall at Western Michigan University. I believe the electromagnet is in the surface below the pendulum ball.

[@mranonymous_25]

Thanks a lot this helped me understamd the theory part much more effectively

[@ZeroStateReflex]

So cool! Have been to astronomy meetings there and always loved that pendulum. Never thought of this perspective, great work!

[@samuelmahler5961]

Concerning your problems in the last video, how did you trigger the camera? The video is so incredibly smooth, and I love your little "animations" in the background, this must have been so much work and preplanning :o I just love it.

[@ScopeofScience]

Thanks! I built an arduino setup a bit like this one: kzbin.info/www/bejne/lYuye5x_q6aqeKc and wired it into the trigger for the pendulum. One of my cameras was randomly slow and didn't end up being useable, which was a pain, but still I'm glad with how it turned out :)

[@georgH]

Love the Penrose non periodic tiling :) When the Foucault pendulum was presented it make news all over the world, imagine how profound was to have visual proof of the spinning world!

[@evanlarkin6109]

great video! so much effort put into this one!

[@L00PdeL00P]

I live near the Boston museum of science and I’ve always had questions about how their pendulum clock works and this answered all of them! Thanks for making this!!

[@felixloiseau828]

And some people still think the earth is flat !

[@ItsMeScareCro]

And some people still think the earth is a spinning waterball.

[@sailorman8668]

@@ItsMeScareCro Do the other spherical planets in our solar system rotate? So why would the earth not also be a spherical rotating planet? Just out of interest, what causes the sun to move in the sky if it's not because the earth is rotating?

[@ItsMeScareCro]

@@sailorman8668 - "Do the other spherical planets in our solar system rotate?" - They're not "planets", they're lights (wandering stars), not "ground you can walk on". "So why would the earth not also be a spherical rotating planet?" - Earth isn't a sphere. Kind of like if all the pool balls on the table are a sphere then the pool table must be a sphere too? "Just out of interest, what causes the sun to move in the sky if it's not because the earth is rotating?" I don't know the mechanism that causes the sun to move across the sky.

[@sailorman8668]

@@ItsMeScareCro Oh dear, you're one of these deluded flat earth believing fools, right? Just so you know, the sun moves in the sky because the earth is rotating - this has been known for quite some time now, lol.

[@N9WF]

Flat earthers : the pendulum is a paid actor

[@GoldSrc_]

Amazing demonstration, keep up the good work :D

[@championpekka]

EXTREMELY underrated KZbinr