minutephysics - 2018-07-20
Check out Grant’s channel: 3blue1brown: https://www.youtube.com/3blue1brown This video recounts a lecture by Richard Feynman giving an elementary demonstration of why planets orbit in ellipses. See the excellent book by Judith and David Goodstein, "Feynman's lost lecture”, for the full story behind this lecture, and a deeper dive into its content. Tweet referenced at the start: https://twitter.com/3blue1brown/status/1016936129117937664 Music by Nathaniel Schroeder: https://soundcloud.com/drschroeder/elizabeth-the-mouse Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/one-two-zeta Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich
Newton - "OMG they don't understand my physics!"
Feynman - "Hold my beer."
Hold my bonjos
Not only Newton. It should be all the other physicists vs. Feynman. Feynman was born too early. He should have appeared today on our planet.
Unfortunately Feynman didn't understand it either. What is at the other focus?
@John Nothing, why does there need to be something at it?
@Michael Eliosov Feynman used both foci to draw his ellipse
This is like staring into the sun. You know you're seeing something awesome, but the brilliance of it blinds.
What's brilliant about it?
@John I mean for the sun nuclear fusion is as easy as breathing is for us. While a lot of people in humanity don't even understand how fusion works in the first place. That's brilliant enough for me.
worshyperbole
@John ... umm...
... the light ...
@John ... de-light ...
As Feynman once said "...it takes tremendous strain on the mind to understand certain concepts.." now I know he was right.
@ironic legacy exactly, theres nothing there. so Feynman's analogy is false
@John What analogy are you talking about?
@ironic legacy The one at 4:15 where they construct the ellipse using 2 thumbtacks and a string
@John That's more of a way to construct an ellipse, not really an analogy
@ironic legacy I cant agree with that. Feynman used the same explanation. At best it causes confusion without explaining anything
"What special curve satisfies the property that the tangency direction for a point theta radians off the horizontal is given by this vector from the special eccentric point from the circle to a point theta degrees around that circle from the vertical?
Okay... Is the question clear?"
Uhhhhhhhhhh... infinite intelligence load error
That has stumped me for a minute :D
ngl, i repeated that single sentence at least 5-6 times before i didn't understand it and sucked it up and went on with it
I am so sorry, but i just liked your comment, even though it had 69 likes. Thankfully, i have the infite intelligence required for this video and i managed to unlike it, not dislike, but unlike, so that it still has 69 likes. Sorry for the inconvenience
Basically,... we're back to the (constructed) ellipse within the circle, made with the string and two focal points.
.
Basically you need to understand for any point along a curve, its velocity vector has a direction tangent to the path. The bit with constructing a circle by placing the velocity vector tail to tail stumps me tho. Rest of it is easily understood if you think about it.
my mom entered the room and i changed to porn because it was easier to explain
@Zes exxxaxzlx
@therugburnz lol
Your mother listened to your explanation.....
And then he banged his mom.
😂😂🤣🤣🤣
The video currently has 467,294 views including my 467,200 views to understand it
That too at 0.5X speed
On "watching Feynman 'splain things is just like watching Bobby Fisher play chess"... How true! In both cases, I feel I understand about 20% (to be generous) of what's happening. : ) (I think I'll come back to this video from time to time)
@J. Meijerink I'm enjoying thinking you really did the math...but too lazy to do it myself. (Ok, typing that felt unacceptable, so I did it... I got 38.6 years. So I'm thinking maybe you did the quickie version in your head or something! In any case, I appreciate your comment.)
@Mary Cordelia Myers It was on the back of a napkin so not all in my head ;). Thanks for the correction, it's nice to see I was fairly close.
@Mary Cordelia Myers I just did the math too, and yup, 38.6 years
Underrated
“So I’m gonna draw it nice and thiccc”
*12 year olds have entered the chat
Alex Matsumura “so you can see all the parts” 😂
Lol 😂
Haha they love sucking on nice and thiccc ddddddddiiiiiiicccccccccccccc😂
As my eyeballs glazed, I realized fully that I do not have 'infinite intelligence'.
I guess it's good for us to run into a wall now and then. Wow.
On "watching Feynman 'splain things is just like watching Bobby Fisher play chess"... How true! In both cases, I feel I understand about 20% (to be generous) of what's happening. : ) (I think I'll come back to this video from time to time)
Newton started off with a bet to prove this (the ellipse being a consequence of the inverse square law) and produced a series of publications, eventually compiling the principia mathematica out of this seed. However, although he never states this clearly, I'm sure he realized that the proof he gave was for the converse: that given an elliptic orbit, an inverse square force law follows. This was much easier at the time because so much was known about the geometric properties of the ellipse than was about F=m a. In fact, Newton couldn't really mathematically use velocities because they compare two quantities with unequal units (distance, time). Also of course algebraic notations and vectors weren't invented yet. But still Newton claimed to have won his bet, and the Principia avoids any clarity about proving the inverse square law vs. the converse (proving the elliptic shape).
I'm sure Newton would have LOVED this type of proof, and this proof in particular! Although I'm sure he'd appreciate how much more powerful modern mathematical notation and ideas such as vector or Lagrangian calculus are. And that's where Feynman and 3blue1brown comes in: Elementary proofs just are the next level of understanding: being able to explain something seemingly complicated in simple terms. With intuitive concepts, but with methods not more complicated that what was available to Newton.
Wow! What a trickster!!!
God not again
Beat Toedtli I didn’t even read the comment because I knew I wouldn’t understand it but I’m acting like I do understand it so I seem smart.
wait Newton didnt have vector????
Gravity doesn't auto make orbits. If the sun moves fast enough, say twice as fast as currently. We would be a kite. Not an orbit at all. The planet spin is all that would maybe change how the sun effects the earth. No years would take place. No seasons.
If the sun moves slower our orbit would A flatten. Or B decay. We all know what that means.
We are lucky. About half or so or the planet's in each galaxy is lucky.
“You don’t need calculus to understand this”
3 minutes later
“As you can see, if you keep adding infinitely small sections to this polygon, it trends toward a circle”
MMABeijing Knowing what a polygon is isn't necessarily calculus, but the change in x approaching 0 is.
@Break Down Are you serious? Im some how aroused about your comment
@Robert Brandywine The Cuclacas
Oh come on its just shapes square peg square ? I dont remember now what were we talking about? I think my Polygon used the big hammer on me?
@MMABeijing
Everything is a pixel? Pixels are Polygons? Therefore ahhh fuckit lets go shoot at stuff
10:48
3B1B : Well, specificly it says that this quantity times the mass of the object stays constant, but, I mean, the mass of the orbiting object isn't gonna be changing.
Michael : Or is it?
Dun dun dunnnnnn
A true method of quantifying intelligence does not yet exist. If it's ambiguous then you might as well be optimistic. Use your finite intelligence to acknowledge your infinite intelligence.
@dekippiesip - Great reply. There becomes a point whereby, from the 'elementary' explanation,.... we could start to include all kinds of variables over time to continually refine and re-calculate.
.
In this case due to 'evaporation' the ORBIT traced by the object, (due to velocity vector differences relative to mass variation) thereafter,...would simply alter to compensate.
.
.
@Hexanitrobenzene
Then we get Snow Cones?
Is that before or after the two objects that made the Comet kissed like Boyfriend and Boyfriend and stuck together? It is so sweet I cannot believe how romantic!!!
So tell me how anyone could come to the delusion, I mean conclusion that ice and /or snow is it? That ice and snow covered in rock and dust becomes a pressurized gas in a vacuum at the Exact same distance from the sun every single time? Every single observed Comet?
Ok I will admit that there have not been many theories that I have said this about, so it may come out wrong but, here goes...Ready?
THAT IS IMPOSSIBLE!
Did I say that correctly? Misspellings?
Nearly as comical in theory as the Dark Knight? Makes for wicked good Comic Book Characters for propagandhi but, absolutely worthless for any explanation or Physics derp. Well on the other hand they should be quite useful as hardened underground bunkers whoops cat is outa the bag...
Put simply STFU unless you are buying Snow Cones then make mine Red Please? Thank you in advance Snow Cones are fricken bomber.
@dekippiesip
On a second thought, if the mass of an object decreases, the gravitational pull decreases proportionally, so everything evens out.
2000 years later:
The physics/maths behind creating level II universes.
Animated and taught by 3b1b the 500th.
Yes, I'm going to pretend like my brain has enough computing power to fully comprehend every single word in this video and instantly apply it to every subject previous brought up, and watch the video a ×1 speed without pauses.
I too, shall do this.
@Fanime Productions T.V. Wonderful, truly wonderful!
An energizing idea!
Think of operating a cnc machine when carving out, the chips fly in those directions, if the tool breaks it also flys in that direction, just have the infinite intelligence to have the guards shut when it dose!
3blue1brown: *explanations*, Right?
Me: Uhhh brain.exe is not responding
3Blue1Brown: continues explaining
Me: brain.exe crashed
David Timothy P yooo for true, I'm just ganna watch Feynman explain it
Twenty One Minutes Physics
Twenty øne min. Physics
Actually, 3Blue Minutes and 1Brown Minute Physics.
So which is longer, a blue minute or a brown minute?
ganondorfchampin, the minutes are constant. Blue and Brown are variables. Brown can be = 18 and Blue = 1, or brown can be = 3 and a Blue = 6, for example. The answer to your question is therefore 'Either'. ;-D
And 44 seconds
The Great Physicists' Road Trip by Ms. Rachel C. Millison
Great physicists from the past decide to return to Earth for one last road-trip vacation to the coast together. They all appear on Earth on the appointed evening. Heisenberg pulls up behind the wheel of a gigantic 1930's car, a huge grin on his face.
As they're getting in the car, Hubble looks up and says "What a wonderfully dark sky".
"Shouldn't be" responds Olbers.
"Always has been" says Hoyle.
"No, it hasn't" says Lemaitre.
"I knew that!" says an embarrassed Einstein.
Once they're all in, Teller says "Hey guys, this trip is going to be The Bomb!".
"Yeah, but why do I always have to organize?" asks Oppenheimer.
"Where exactly will we end up?" asks Kepler.
"That's impossible to predict" says Bohr.
"I just can't believe that's true" says Einstein.
Heisenberg punches the throttle and the old car roars off.
"Say - this thing sure accelerates" says Newton.
"I don't know, Isaac. It feels like gravity to me" smirks Einstein.
Later that night, as they are speeding down a country road, a police car catches up to them and pulls them over.[1]
"Do you know how fast you were going?" the cop asks. [1]
"No, but I know exactly where I am" Heisenberg replies. [1]
The cop says "You were doing 55 in a 35" [1]
Heisenberg throws up his hands and shouts "Great! Now I'm lost!" [1]
The cop thinks this is suspicious and orders him to pop open the trunk. He checks it out and says "Do you know you have a dead cat back here?" [1]
"We do now, asshole!" shouts Schrodinger. [1]
"I think it's time to split" says Everett.
"Say, how did you manage to spot us on such a dark night?" asks Hubble.
"I saw the light from your head lamps" says the cop.
"How fast was it going?" asks Michelson.
"That's simple addition" giggles Galileo.
"Not exactly" says Lorentz.
"Look here" says Heisenberg, "how do you know I was going that fast?"
"I clocked you over a measured distance" says the cop.
"How often?" asks Hertz.
"I disagree with your measurement, officer" interjects Einstein.
"Don't start tonight, Albert" says Bohr, shaking his head.
"What Herr Einstein is trying to say" continues Heisenberg, "is that time was running at a different rate for you than for us".
"WHAT!!!???" exclaims Newton.
"It's true" says Maxwell. "We're all famous scientists and, believe us, Herr Einstein has proved it, though it came as no surprise to me".
"Sounds complicated" responds the cop.
"I'll draw you a simple diagram" says Feynman.
Totally flummoxed, the cop lets them go with a warning. As he drives away, Doppler cocks his head and listens to the sound of the receding police car. "Gotta love that" he says.
"Amen" responds Hubble.
Returning to their car, Lord Kelvin remarks "Sure is warm tonight"
"Yep - lots of disorder" replies Boltzmann.
"In places you'd never expect" adds Hawking.
"I was lucky to get away with that" says Heisenberg. "Most cops think they're better than everyone else".
"Yes - I hate inequality" adds Bell.
"Though you were speeding" says Faraday to Heisenberg. "I carefully observed the needle creep from 35 to 55".
"Actually, it was jumping, Michael" replies Planck.
As they pile back into the car, Bohr says "See here - you must fill the seats in order - no empty spaces allowed. And stop interfering with each other!"
"Only one of you can sit next to me!" yells an agitated Pauli.
"Say, Werner - it's stuffy in here. Be a good chap and crack the window a bit" says Hawking.
"Sorry, Stephen. It can be all the way up or all the way down, but nowhere in between" replies Heisenberg.
"Hey guys - Albert and I just figured out a great shortcut. Only one bridge" announces Rosen.
"It will save us a lot of distance" says Einstein, "but it might get spooky".
Arriving at the beach the next morning, they hurry from the car and stand looking out over the ocean.
"Look at the wonderful waves" says Schrodinger.
"They don't look like waves to me" says Bohr.
Looking down at the fine sand, Dirac exclaims "Look at all the particles!"
"Now those look like waves" says De Broglie.
"This is great!" exclaims Feynman, rubbing his hands together. "Now, lets go meet some girls!"
"Let's delay" says Wheeler.
"We have to be discrete" warns Bohm.
"Girls? NEVER!" exclaims Newton.
1 Based on, and including the original, attributed to Rich Granger, engineer, Battelle.
thanks for putting this thing up, its awesome
yeah 3blue1brown you are my daily dose of intelligence
Infinite intelligence? :P
If you pause at 19:15 you can see what my eyes were doing by this point in the video
Minute physics that takes 21 mins ? .....we are off to a good start.
Its not time its angle, check the meaning of the word minute
When 3B1B hosts this channel:
Bravo Six, going dark.
Thank you for the effort that was put into this. Amazing people, teaching millions of anonymous people, you deserve more gratitude that can be offered in a comment!
4:23 I heard that as "... pull the string thot"
Ended up finding a thot rather than learning physics.
Feynman has a Queens accent. He is from Far Rockaway : )
Minutephysics + 3blue1brown + Feynman? Knowledge-gasm!
no such thing as gasx or knowx or jax etc or not
Cringe
Sebastian Elytron i am sure you didnt understand shit
You have good taste in games.
Unfortunately both make a ton of mistakes
"...approaches a Perfect Circle. Isn't that neat?" - "indeed it is!" (Walks away and puts Lateralus by Tool on play)
“The laws of physics cook things up just right.” And remember kids, it was all an accident; just mere coincidence.
"Stay focused"
I see what you probably weren't intending to do there.
Does "What shape do Velocities trace off" Have anything to do with Legendre Transformations?
3blue1brown and Feynman belong in one set regarding their ability to explain.
"Surely you're joking, Mr Feymann !" is one of the best book I have ever read. Its deep, it's mind-boggling, and much more, it's fun !
My favorite work of nonfiction ever.
Somehow, I've always thought of Ellipses as the set of points generated given the base of a triangle and the sum of it's three sides.
I am crying with tears of joy at the beauty...
I find it fitting that a guest video was used to talk about a guest lecture
I just realized that.
Serendipitous, to be honest...
@Marcus Campbell now rotate that by 90°
Wonderful presentation and explanation...now, I want to know what was Newton's working which Fenyman couldn't follow, if that is what Grant said.
That black dot on the screen from 1:43 to 1:48 got me! I was pawing at my screen trying to remove the 'spec'. How dare you! :3
Wouw I thought lol I’ll never get that stuff it sounds too complicated 😂 but I actually get it 😳
Who also had this haha 😜
By 6:18 I suddenly understood all of it! It was a great feeling
I'm afraid I only have a finite amount of intelligence.
Turn Feyman's joke into a non-joke. Get 600 thumbs up. Ok
Be afraid of intelligence, limits you.
unrelatable
Or a limiting case therof of an infinite but convergent representation.
Zod great reply...i also think in the similar way..
thank you
The fireplace is traditionally the “focus” of a living room and thus the Latin word links in that regard also
except for the intro part and the ending part, I thought I was I was watching *3blue1brown*. I love each and every video he has ever made. Great fan.
Remember that. Intelligence is always Relative.😉
His voice is so smoothing, I could listen to it all day.
OMG, my head hurts. I need a drink.
Day 3: I have used the concepts in this video to clear up 4 of my doubts, again.
0:14 MINDBlown
I saw that same thing in my coffee mug
11:42+ "albeit at some loss of elementarity" LOVE!
THIS IS SO BEAUTIFUL!!!
Tl:dw - an elipse is a cross section of a cone.
Damn I loved this masterpiece so much
3Blue1Brown - 2018-07-20
I know what you're thinking: Either Henry is taking some well-deserved time off and I'm just helping to fill in during that vacation, or else he's currently tied up in my basement providing me occasional sound bites for food while I slowly take over the channel for good. To anyone worried about case #2, don't be silly.
He's in the attic. Way too many escape routes in the basement.
feetedmy_yeetus666 - 2019-12-19
@Austin David The Sun is probably one of the foci.
Du Fisch - 2019-12-30
@hany ashraf e^(i*phi) = cos(phi)+i*sin(phi) and ist therefore periodic. That means it maps multiple inputs to the same output. In your case e^x maps both i*tau and 0 to 1. ln(1) could mean either of them but the usual definition is ln(1) = 0. In your equation you're using ln(1) = i*tau instead.
Dwight Keller-Williams - 2020-02-05
where prisoners should be kept. because we all now that a prison up in the sky is worth more than a prison below ground. (because of falling.)
Simon Tracer - 2020-02-07
Inshort you never said Galaxy. Or size of the sun. In any of that
Damxge The AAG - 2020-03-12
Why is your comment not pinned