Arrow of Time - Sixty Symbols
ฝัง
- เผยแพร่เมื่อ 19 พ.ค. 2013
- Sean Carroll on the arrow of time.
See all our videos with Sean: bit.ly/115AVqa
Sean's book about the arrow of time: amzn.to/1hCYrPr
Visit our website at www.sixtysymbols.com/
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And Twitter at #!/periodicvideos
This project features scientists from The University of Nottingham
www.nottingham.ac.uk/physics/i...
Sixty Symbols videos by Brady Haran
A run-down of Brady's channels:
periodicvideos.blogspot.co.uk/... - วิทยาศาสตร์และเทคโนโลยี
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Of all the people featured here, Sean Carroll is one of the best at communicating clearly and precisely.
trefod It's not really a fair comparison because the others are teachers so they aren't really used to trying to explain new information to people.
Jacob Estes Oh You! :D
+trefod I wish Richard Feymann was still alive and taught me physics
+ray lin That must be on the wish list of almost all sixty symbols viewers. I know it's on mine too.
+trefod I agree. I enjoy listening to him.
Hes such a great communicator
I love how Brody keeps asking the right questions thus leading into a more interesting video
Who the hell scrambles an egg with the shell still in
DarkLordGiggles Some working physicists, who think too much:)
haven't you heard? it's more organic!!!
australians
HowtoBasic
@Dark People that believe they can unscramble it.
I want this guy as my prof, I could listen to him for hours, his voice is so soothing lol
+xToTaLBoReDoMx it is possible, if you join Caltech as a student.
❤
I love this guy, please do more with him!
Brady, I love what you have done for us here with all these channels. I don't think I've ever learned as much as when you interview these brilliant people. And your way of asking questions just shows what a great view of life you have and how you really burn for these types of questions.
These channels are my go-to place whenever I need a thoughtnugget, thank you so much for doing this for us!
Brady, you do a really great job editing these videos. Enjoyable to watch.
Liked for teaching me the word "retrodicting."
Yesterday, Sixty Symbols taught me "countervailing"
"goes up and and down".. funny face realizing that his hand went in the other order.. "I should say down and up" LOL
Please tell Sean that he needs to narrate a documentary at some point in his life. He is so good at explaining things and I could easily listen to his voice all day!
Really enjoy the videos you've made with this guy Brady. He explains things very clearly and in a lot of depth and his analogies are so insightful.
There's loads coming out this week across my channels!
Never stop
The arrow of time sounds like something you'd find in a treasure chest in a Zelda game
"our universe started in a state of exquisite order" solid quote right there
I love the explanation. Also I love the equations on the board in the background. Details like that can make one feel a lot better, and contribute to a video's quality.
great to hear - thx
Sixty Symbols Nice video
He reminds me of James Woods. Wish I had a physics professor like him at university...
Thomace22 he really does.
what an incredibly enriching chat! this channel is a goldmine for the mind, this should also find itself featured on the front page of youtube alongside of all the banal content.
I like this guy. He explains things very well and is enjoyable to listen to. Please include him in more videos.
mentions breaking an egg and scrambling it
dumps whole egg in a bowl and tries to beat it
I left a glass of water on my bedside table last night and when i woke up there was ice cubes in it. Forgot to say I went to sleep outside at the south pole...
How did it break into cubes though? =O
How did that happen?!
The fluency and clearness in they way he talks is perfect.It makes those who don't have a physics background help get a grasps on these fundamental ideas. As can be said about all the other talkers on sixtysymbols, and Brady's other channels. Bravo.
By the way, thanks for being probably the most insightful and broad-ranging youtuber there is :) Keep up the awesome stuff, you inspire alot of people to take up particle physics, mathematics, etc. through your videos.
Time flies like an arrow. Fruit flies like banana.
I remember reading that in Omni magazine .. "roses are red violets are blue, space is warped and so are you"
Like the frogs say "Times fun when your having flies"
nice copy and paste..
Time flies like an arrows, fruit flies like a banana . :D
What makes these videos damn awesome is the fact that Brady always asks the questions the rest of us are thinking about. That's why I love these videos and think that these are more educational than many straight up explanation or teaching videos of the same topics.
I love Sean Carroll and I love Sixty Symbols! How did I miss this one.
Entropy is not what it was.
Chaos is a granularity error.
The definition has become 'messier'
It just complicates matters.
Literally.
Does that mean the time on the other "side" of the big bang has an arrow of time going away from us? :D
What do you mean with "the other side of the Big Bang"?
Duh, dimensional theories, it's like an anti-bigbang supposedly going back-timed (for that universe it's forward-- or something I DONT KNOW)
It means that your brain is attempting to move backwards in time by organizing information, while the universe is moving forwards in time by disorganizing that which began in an organized state. We are trying to remember what the universe has forgot.
Really nice question!. However, as time is basically interaction, if nothing occurs before the big bang then there is no change in space. If there is no change in space, then as spacetime is inextricably linked, there will be no change in time, and thus no direction to it.
There are some interesting discussions about that topic
I could listen to Mr. Carroll talk for hours. His mannerisms, speech patterns and inflections make him very interesting to listen to, while his explanations are well articulated for folks who haven't a clue what he's on about going in. He makes complex subjects easy to listen too, and hopefully learn a little from.
"Retrodicting"! A wonderful word that I hadn't come across before. Thanks for that.
8:13 interviewer- time rules your life.. the guy- no one rules my life..(say one more word and imma punch you in the face!!)
The Jack Bauer of Science.
Excellent video! I would like to see more of this professor!
I really love this guy. To me he has a incredibly good interpretation of "things".
I thought he was talking about One Direction
Has he ever thought that maybe it could be a big ball of wibbly wobbly timey wimey stuff?
+1 for Hitchhiker's reference. Douglas Adams was awesome.
Andrew Tofelt
Was that in Hitchhikers? It does sound like Adams.
That expression has been used a lot on Doctor Who. I think the first mention was with the introduction of the Weeping Angels.
time in our universe is one dimensional, so unfortunately that reference is false
Great video, a very clear way to explain the systems we have to use. Although as one of my 1st year students pointed out to me before. The pendulum does slow down.
Congratulation to Brady and Dr. Sean Carroll for the great video! It was such a good conversation! Thank you very much
Excuse me, but I remember what happens tomorrow p.o
I uh... eat cereal.
And do stuff... Yes.
Time seems to be as physical as it does metaphysical..
Except it isn't. You can measure time, it can be defined by other physical quantities, and you can measure its effects on objects. It is antithetical to metaphysics.
Stop with your nonsense word plays, there are no measurements within metaphysics, there is with time; there's a huge distinction between the two. So yes, I suggest you stop repeating idiocy without conscious consideration of what you're saying.
I gotta look that up in that case! In the few videos he has been in on sixty symbols he's starting to become one of my favorite "stars". The way he explains things is extremely clear and always spot on. Enough detail to keep it relevant and correct, but simplified enough so us normal people can understand it in one go.
Quite honestly I'm baffled after every video with him in it. Such a smart and inspiring man to listen to.
Sean Carroll videos are always good :) more of that !
I don't believe in an 'arrow of time'. I believe that time is just like space, it has no natural direction in which it progresses. The arrow of time I think is an illusion created by the fact that we remember our past and not our future. This gives us the illusion that we are progressing in time and essentially moving from our birth to our death at a fixed rate. This rate would be the speed at which our brains process information and turn the information into short-term memories. I believe that all our versions are existing and real, just as real as a third spacial dimension is compared to the second. Only those versions have different memories which makes each version think it is progressing in time. This is a really interesting way of looking at the difference between the world the way perceive it and the world the way it actually is, with 4 dimensions rather than 3 dimension of space and 1 progressive time dimension.
There is still the question: what is it about that fourth dimention that make any given version of us remember things only in one direction and not the other?
+Ariel Rile Well, quite. The comment seems to be saying "I believe the arrow of time is an illusion caused by the fact that the past and the future are different". It's a bit like saying you believe gravity is an illusion caused by the curvature of spacetime.
So basically, quackery?
I'm another 3+1 dissenter who believes time isn't unique amongst the dimensions. I'm not with you on the many-worlds interpretation, but I'll help you make your case for 4 dimensional space...
Let's start without a reference frame. It is impossible to say how fast objectX is going, the rate of its clock, how compressed it is in any of the spatial dimensions, or its mass. But, objectX has itself as a reference frame. We can now say objectX has no movement in space, its clock runs at full speed, it's uncompressed in all dimensions, and has mass of X. Pick any other reference frame, and things start to change... The subset of possible reference frames that see objectX as moving arbitrarily close to c is still infinite in number.
The universal constant is a ratio of space to time, but thinking of it as a speed gets the numbers right, but misses the point. It's a ratio of equivalence.
One second=186000 miles
Covalence Dust radioactive decay is and example of single time direction. They never gain neutrons. The basic cycle from H to the heavier elements shows the natural world we exist in is omnidirectional.
So many Brady Haran videos released in one day. Today is a good day! :-)
I agree, man. Awesome job! Love this channel. Keep up the good work.
Thanks for the educative explanations for such difficult questions!
Just love these types of vids!
Amazing video, thanks for making this information available.
He's got a good voice and style for this kind of thing. Very clear and engaging.
I've heard this explained before, but not quite as well. Thanks Brady and Sean!
I laughed @ 3:17 It sounded like he is saying "arse water"
Finally! I was waiting for this since january.
Awesome video ! Sean Carroll is a great explainer
just realized this is the guy that does some of the best pieces of work for the great courses. if you have audible its a must buy
This guy is excellent with... everything relating to what this channel tries to achieve.
This guy is great. keep up the good work as always
I really liked this episode.
This is the kind of thing I like to learn or hear about.
Thank you a lot for these videos .
in addition to or instead of the entropy factor, I wonder if the many worlds interpretation of QM is a quality of the directionality of time. if universes split into multiverses as time goes forwards and as entropy increases, do separate universes re-merge into one if entropy decreased with time?
Very good questions Brady. Awesome video!
Stunning line of arguments.
This was really interesting, thanks!
New Computerphile, Numberphile, and Sixty Symbols videos within a week. I think my head just exploded!
I was just watching a Bryan Cox lecture on this :)
Starting at the level of an atom with its electron cloud surrounded by vast other clouds of uncertainty but each with probabilty and when acted upon a definite arrow has been created and entropy is in action. I am curious to know how the probability clouds allow time to propagate and the variances in possibility outcomes .
I really dig Dr. Carroll! I could listen to him talk about physics for hours (and have thanks to a number of talks available on TH-cam!). Make sure Brady you corner him every chance you can get!
And keep up the excellent work. I would like to see more 60 symbols videos (as much as I like Numberphile I love me some physics...)
Truly excellent explanation. This man is a fantastic teacher.
Could photon energy form the process we see and feel as the flow of ‘time’ a process of continuous energy exchange or continuous creation?
With light being a wave over a period of time and a particle as time unfolds with each photon electron coupling. The electron is the most spherical object in the universe so this can form the low entropy for the increase in entropy that we have in the Second Law of Thermodynamics.
Could someone please explain the word "entropy" in an easy way?
I've just looked it up but I still don't get it...
Love this guy's voice. I could just listen to him talk physics all day.
I like the way he talks - very clear and concise.
Very Interesting video, as usual from sixtysymbols, thank you! It did however somewhat strike me as odd to say that Aristoteles didn't give time much thought, when in fact his fourth book has four chapters devoted to time. Sure they were not the last words on the subject, but there were some serious philosophical fundamentals laid there.
I quite enjoy these videos with Dr. Carroll, do you have plans for any others?
By the way, I think you explained this topic marvelously. Congratulations!
Finally! I was afraid you had given up on sixtysymbols. Thanks, Brady, once more you saved Townsville.
"air molecules" apart, i get really excited when i watch this kind of video! Its awesome beacuse It not only teaches us how the universe works, but give us something to thing about.
But, if you allow me, Brady, for most of the topics covered in your videos, 10 minutes is not enough. As Derek, from Veritasium2, said in his last video: "...there are things that get better just by lasting longer."
This channel is regularly blowing my mind. Thinking of time as a similar function of gravity just turned my views upside down.
I enjoy his voice and how he formulates what he says.
this channel is heaven. thanks.
Well done Brady :) I liked this one!
I wait in anticipation of these videos! Awesome stuff.
Does anyone know what "Sixty Symbols" referances?
great video as always :)
his voice is very pleasing, it is easy listening to him
I could listen to these guys ALL F**KING DAY and still not get bored haha thanks Brady keep me coming! I need to stay sane haha
Hi - any reason why you didn't ask about the delayed choice quantum eraser in respect to the arrow of time?
Just wondering, if you cant define a direction or movement if you have nothing to reference it too, than how does centrical force work when there is no constant ∆V?
Yes! Thank you Brady!
This was an eye opener!
Does entropy have a rigorous definition? How is it measured?
Thank you so much. I've been waiting for so long for a reply!!! I will check this out/
Great video!
The most awesome is the idea of comparing time and space - "space has `arrows` when near a big body" and "time has `arrows` when near a big event"
thanks!
Could time is an emergent property with an Arrow of Time for each individual reference frame with the future continuously coming into existence photon by photon? The quantum wave particle function Ψ or probability function of quantum mechanics represents the inward absorption and outward emission of light with each new photon electron coupling representing a new moment in time within that ref-frame. Photon energy forms the process we see and feel as the flow of ‘time’
As about 12 people have mentioned before me, Sean's voice is great.
The topic/discussion was great too, but there are lots of those on this channel. Sean's voice stands out notably.
Could the Fibonacci sequence be formed by the spontaneous absorption and emission of light?
All the info I can find says that this process is formed by the quantum wave particle function Ψ of quantum mechanics. When this is reformulated as a linear vector ǀΨ (t) > the two previous vectors are added together to form a new vector this forms the Fibonacci sequence 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ∞
We will feel this process as the arrow of time within each reference frame.
Would have liked a link to the full video of the preparation of the Nottinghamshire crunchy omlette.
Is the "arrow of time" being bi-directional true in quantum mechanics? In any of the interpretations of QM how does the interpretation reconcile the irreversibility of time?
Armen V Yes, QM, as described by the Schrödinger and Dirac equations, is fully time reversible. The irreversibility of time is an effect of the entropy of the system, but that is just a description of what we know about it. If you have a totally well defined number of particles and energy everything is perfectly reversible. If you only know the mean value of those things you need to use statistics to describe your system, and then it stops being reversible as your entropy will change.
Thanks for this video!