minutephysics - 2016-09-29
Thanks to Google Making and Science for supporting this series, and to Sean Carroll for collaborating on it! His book can be found here: http://www.penguinrandomhouse.com/books/316646/the-big-picture-by-sean-carroll/ Playlist of the full video series: https://www.youtube.com/playlist?list=PLoaVOjvkzQtyZF-2VpJrxPz7bxK_p1Dd2 Link to Patreon supporters here: http://www.minutephysics.com/supporters.html AMAZING Interactive Entropy explainer by Aatish Bhatia: http://aatishb.github.io/entropy/ This video is about why entropy gives rise to the arrow of time, and also how the initial low-entropy condition of the universe is responsible for the fact that we experience time right now, and how ultimately it will lead to the high-entropy heat death of the universe. REFERENCES & ADDITIONAL INFORMATION David Wallace on entropy of gravitating systems: http://arxiv.org/pdf/0907.0659v1.pdf Sean Carroll: The Big Picture (more great articles about entropy, etc on his blog http://preposterousuniverse.com) Julian Barbour et al on entropic time simulation: https://www.sciencenews.org/article/arrow-time Music by Nathaniel Schroeder, http://www.soundcloud.com/drschroeder MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter - @minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich
"but how did this universe with a specific, low entropy state come into existence?" suddenly, a creationist appeared
Who are you, and what have you done to Henry?!?!?
most important question
His name is Sean M. Carroll, a theoretical physicist and cosmologist prof from Caltech. He works on cosmology, field theory, gravitation, and quantum mechanics. He has a bunch of excellent lectures available on youtube, on topics like the Higgs boson, dark energy and dark matter. He's the real deal, I'm excited to see him collaborate with minutephysics :) .
@DC430 Thank you
I know I'm a nerd when I can tell any of this guys (in any channel) just by their voice....
This made me laugh so hard! (Though I did know his name)
0:42 actually as far as i know, you cant say that it will never unmix beacuse there are always matchematical chances that it would :D
True. Science makes possible.
Aren't we just defining the direction of time based on our definition of direction. What if time isn't going in any direction
Time in our Universe most definitely has a direction. It's the measurement of the state of our Universe as it moves from a point of low entropy (Big Bang) to high entropy (current state), following the 2nd Law of Thermodynamics, as the video says. This direction, from low to high entropy, is what is called the Arrow Of Time. Anyone who states that time has no direction is not grasping the full concept.
Algorithmic Process “the past is far behind us, and the future doesn’t exist.” -clock man
Time is just the displacement of matter in space. If there is no displacement in space there is no time. Time does not have any direction. We mortals thinks that way.
If time didn't have a direction,the big bang wouldn't have ever happened
Stop insinuation fantasy facts and create falsifyable model which supports your claims. All other models have time as just another direction.
"Eventually all the stars will burn out and blackholes will evaporate and we will be left with emptiness in all directions" Yeah this is a real mood booster :D
I still don't think the universe is like soap where bubbles come out. If you want a bubble you will have to make or shape it yourself.
why would time disappear if matter would disappear?
You've probably heard of Einstein. He discovered 'spacetime'. Which means space and time is connected inherently
666th like
ImmaterialDigression I’ve thought a lot about that even before I watched this video
Time isn't a line, it is a circle. That is why clocks are round.-Caboose
Time has no shape it is we who reshape the time to make the use of it easily.
It's just mechanical adjustment
And the end points of circle are managed by god
Is your surname truly Molko? Because I only know one person with this surname... that's all
I highly recommend The Last Question by Isaac Asimov if any of you haven't read it. It deals with the heat death of the universe and humanity's struggle to find a way around the 2nd Law of Thermodynamics. It's about a 15 minute read and it's free online.
Thank you for the recommendation. Thoroughly enjoyed it!! :D
My literature teacher last semester was all about sci-fi and existential crises so she had us read The Last Question. It got me fucked up on some wierd kinda way and I loved it.
notstarboard thx for sharing dude! Awesome!
Ha! I saw a presentation of that in my high school planetarium back in 1976. I forgot about until you mentioned it 😀😀😀😀 THANKS!!!
It's a great story.
Ahh reminds me of the short story " The Last Question" by Asimov.
A recommended read
so if I'm a mixed coffee and milk , I can live forever?
Scary thought: If time decided to backwards for a few days we would never notice.
But... What if you could feel, but only react to it subconsciously.. so inside you'll have an internal hardcore anxiety attack while witnessing time... Uncontrollably backwards. Can you imagine the amount of confusion and PTSD for what just happened once time was controllable again? Now THAT'S a scary thought.
It wouldn't matter if it did "decide" to move backwards for a bit; the past events already occurred as they did, and would play out the same way, leading us back to the point we started at. Nothing would change.
Entropy can be cyclic.
@Hubert Applebaum Vsauce michael here
This burned my brain
Finally..!!!! a new vid from minute physics...
Nice to see ya making videos again..
Yes, I understood that. Really, I did. Trust me. I got it.
What happened to your voice?
Oh that's why
LMAO
What if the big bang was an experiment that some super-creature dropped during his 5th grade science experiment.
"Time is a ruler to measure the day, it doesn't go backwards only one way"
That's why.
Doesn't my ass. SHUT THE FUCK UP WITH YOUR FUCKING SHIT TIME. JUST FUCK TIME. I HOPE IT GET REVERSED PR DESTROYED. LOOK AT IBM REVERSE TIME USING QUANTUM COMPUTER AND HOPE YOU GET PROVED WRONG.
But can quantum computer reverse the universe from inside out?
I fell in love with science (ages ago).
this was cool.
and also incredibly depressing.
so I know I'm watching an astrophysics video.
Everything was going well until "Then the big bang happened"...
I hate entropy. I hate that the universe will end.
@Jason Muniz you wouldn't want to, even if you could. It's like saying I hate that I need oxygen. I think I'm going to defy my mitochondria and stop breathing. We exist because of entopy. Slowing, stopping or reversing it is like trying to purge all the O2 you have breathed.
Pepijn FUCK THE UNIVERSE AND FUCK TIME.
And i hate time. I want to find a way to make that shit goes backward.
SoftserveSodium I don't care about that, the only thing i care is how can i reverse this fucking time.
@christian babis Make sure your descendants remember your quest in reversing entropy
THIS IS SO FreAKING ExCITInG I love it
youve oficially killed my brain. thanks.
Antimater moves backwards in time.
1:27 MY EYES!!!
...backwards flowing is time if knowing of way no have We
but wut if time flowed up? or down...
DUN DUN DUUUUUUUN with life
...siht ekil ti depyt uoy rehtar d'I
!nur ,seispyg yps I esruN
@ King_Noah_ r u OKAY m8?! XD
@One Dude !epoN
I just finished reading Sean's book, I loved it!
Don't watch this video you'll have an existential crisis.
0:15 but time symmetry tends to break, as could be seen in fundamental particals such as quarks which are bound by strong nuclear force, for ex- two different quarks can switch places with each other however the time taken by each particle switching places is different, hence time symmetry do tend to break down (but not s-p-t symmetry). By this, we can differentiate between past and future, so there "can" be a distinction in time under certain circumstances in microscopic world. Just my two cents.
Edit - Pardon my grammatical errors, if any. English isn't my native language. Thank you. :)
3:13 Sounds like 42 to me.
0:05 Guys, Schroedinger's cat is in almost every video.
amazing stuff. I can't even imagine what two futures mean in option 1
This was a real treat! Thanks Henry! Thanks Sean! Mark Twain once said "I would have wrote you a shorter letter but I did not have time". Mr. Clemens would love Minute Physics!
"Oi, JOHNSON... why are you asleep at work?"
"Boss, you should be thankful! By not expending energy and thus increasing entropy, I´m doing my very best to stave off the heat death of the Universe! I´m basically a super hero."
Thank you! I had been really confused about this topic for a while!
thank you for this video I've been watching some flat earth videos and they killed 50% of my brain cells
2:27 when we drink too much
Entropy increases with time, therefore time increases with entropy sounds like a weird circular argument to make.
I love the reflection about time, please be a long series of videos!
Loved the guys voice. Also the content was awesome too :)
I found this incredibly informative thank you.
Thank you for blowing my mind. :) I love science!
I thought I recognized that voice!
So you're saying time can/ will run out when it reaches equilibrium?
Covalence Dust No, time doesn't necessarily "keep ticking." Equilibrium means nothing is changing, and if nothing is changing then time has effectively stopped. Time isn't "ticking" at that point because there is nothing left that can tick.
time isn't relevant to a dead species anyway, in the eyes of humanity when we are extinct time will not exist because we are under the assumption that there is no other conscious life in the universe
In an equilibrium, time still flows and low entropic states are still possible but they are not probable. But if time is infinite...then the unprobable becomes a definite.
Well, by the time the universe ends, in theory of becoming very dark and cold. Does time stops then? What keeps the universe cold as it expands? How do we know that 14 billions years ago was the big bang, maybe the time during that hot big bang , the time expands faster? Maybe the big bang could be a lot longer or shorter?
@Gary Malarkey eventually rare reductions in entropy will happen and create a new big bang the second law is statistical rather than deterministic
These are the videos that blow my mind! I love it!
how do we know that time isn't flowing backwards already
RP its just that in the line you say "you have no memory of "this has already happened"" got me thinking about that..
"Time" is an illusion based on the summation of infinitesimal causality.
Also, perception of time is relative to those within it. "Backwards" is a definition based upon relative terms. We are "moving forwards" in time relative to ourselves.
xApemanx time doesn't flow or move or change at all. You can observe it (more accurately the effect of it) by anticipating - and recollecting..
You've just fried my brain. Are big bangs cyclical? is there a contractive phase? If so, we should drop the prefix "big"
It doesn't matter in which direction the time had started. For example if it started in backward direction then we would call that direction 'forward direction'. I mean forward and backward is only our perspective.
Since the concept of entropy and the "direction of time" require observation and experience via consciousness, it shows that the universe and time are constructs of consciousness. They can never be separated from our consciousness.
1:24 and i was ready to sing tbbt theme ....
i loved this video but I wish I could find something that tells about entropy at even a more basic level.
Thanks for sharing 😊
one question🙋: define time
AskNickFilms - 2016-09-29
Nothing like a MinutePhysics video to give me an existential crisis
devie lee - 2017-05-19
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Cannizzaro - 2017-06-16
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GD Drumming - 2017-07-04
devie lee or vox and ted ed and
BlokenArrow - 2017-07-14
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