Why Doesn't Time Flow Backwards? (Big Picture Ep. 1/5)

I think you are thinking backwards, but you are not. That is also why time does not flow backward -because you don't think backward. Time is in your head.

Is it possible that a big bang like state that originated our universe could have NOT been a low entropy state?

2013: Reply button is visible again!

Wait, I'm still confused. How does our mind interpret increasing entropy as time happening? And does that mean that if I was put into some like science experiment box explicitly designed to have a decrease in entropy occur inside it, would I experience time backwards?

Scientists cannot predict a weather tomorrow, so I do not trust you on what happens in billions years from now.

Describing entropy as a fundamental law that determines tge direction of time is misleading. Entropy is a statistical, probabilistic concept. Probabilities of a bowl with ink dissolved in wather are extremely higher than, the dissolved ink become a drop a come out to the original container... But possible in theory.

theres a negetive time invented in the world but destroyed immediatly by laica

If the big back exploded forward it must have exploded backwards as well

Awesome
Thanks

Was this video made after the discovery of dark matter and that the universe is expanding at a more rapid rate?

Every other subjects: You are a valuable organism
Physics: you are a mere useless strand in the grand scheme of things.

This didn't really answer the question at all for me... :(

Like I think That time goes Forward by default buts can go Backwards but just doesn’t or it may have gone backwards to a few minutes or hours or days like who knows buts I don’t think time is some “entropy” or whatever

Time is an abstract law, and not a physics phenomenon.

Time doesn't flow backwards because that's where in infinity everything began.

It would be interesting to see Sean and Henry watch Tenet and try to understand it

sir, do u know, in which scenario can energy converted into mass and vice versa...? and also mention the sources by which i can get this answer in more detail...♥️plzz reply if u seeing this🥺

NDE confirms that conscience is fundamental and does not depend on life even max plank said so

"...Stars will burn out, black holes will evaporate, we will be left with nothingness. At that point times arrow will disappear"

It's like saying
"All the clocks in the room will disappear, at that point times arrow will disappear"

Every system with a finite ending time will fail to be time-reversible, and since current physics' classic solutions are always never-ending, there is a flaw in the traditional mathematics' tools used: since they are always holding uniqueness of solutions, they will never model accurately phenomena with finite duration, which left us with models that don't show the direction of the arrow of time on their 2nd order differential equations.

As example, I have found an interesting issue with classic pendulum equations: if you consider the Drag Force as the classic Stokes' force:
F=b*x'
the pendulum eq. is (for some positive constants {a, b}):
x'' +b*x'+a*sin(x)=0
a diff. eq. that under the transformation:
t --> -t
is not time reversible! (which is commonly only atributed to entropy by the 2nd Law of Thermodynamics).
But if instead the standard Drag Force:
F=b*(x')^2
is used, the diff. eq. becomes time reversible, but its solution are never decaying!... so it is needed to modify the Drag Force in something like:
F=b*x'*|x'|
to recover the decaying solutions, so somehow, the condition of been non-time reversible is required!
But even with this improved drag force, solutions are never-ending in time, since the diff. eq. holds uniqueness of solutions due Picard-Lindelöf theorem... but, if I change the Drag Force by something like:
F=b*sign(x')*sqrt(|x'|)*(1+|x'|^(3/2))
which resembles Stokes' Law at low speeds (non-near-zero), also resembles the quadratic version at high speeds, but introduce a non-Lipschitz component at zero speed, now the differential equation:
x''+b*sign(x')*sqrt(|x'|)*(1+|x'|^(3/2))+a*sin(x)=0
will be having decaying solutions that will achieve a finite extinction time t=T< infinity (so x(t)=0 exactly after t>T), also with a diff. eq. is not-time-reversible. Hope you can review this, is easy to see it in Wolfram Alpha.

I love the concept of entropy!

I have come back to this mini-series again and again since they came out!

Spoiler alert - the direction and nature of time may have something to do with entropy, but we don't really know!

Muse's Isolated System, Tenet & Interstellar in a nutshell.

time might actually be going backwards, its just that we see it as going forwards

But given an infinite amount of time with of black hole residue, won't instances like the Maxwells demon thought experiment cause occasional relapses in entropy, causing mini-timelines to occur spontaniously? Omg is our universe one such thing?

If the four fundamental forces of nature can be deducted to only simple rules. Still The Second Law of Thermodynamics shall be a principle over the rules.
Without only chaos remains.

If entropy increases doesn't that mean the universe is heating up (instead of cooling down)? If so then doesn't that mean time is going backwards (or our consciousness is going backwards through time)?

so why was universe once in a 0 entropy state? This answer is incomplete. This answer is the same as saying "time goes forward because it does", it doesn´t add any aditional information. Nor proposes any "mechanism" on why it can´t go backwards and what would "going backwards" mean.

All I have, is a word for you... TENET!

I heard Sean Carroll, I like it

Friends,will you do me a help☺️? My native language is not english,but I am doing my videos in english language.Could anyone please tell me wheather you could understand my english slang.If you can understand please put 👍 in comment section of any video ,otherwise 😇

If Evolution is an attribute of this Universe, an attribute that caused minerals to become micro-machines, becoming what we call life then only growth/multiplication of kinetic energy/anti-entropy/time moving forward/etc should be possible thus decay/devolution/death/entropy/etc must mean time is moving backwards and decay is the only way to measure it...

The only way to reverse time is that every single human being on earth alive today do exactly what they did yesterday to the T same food same conversation same clothes same every thing i wonder what would happen if we all agreed rip to the people that died yesterday

Thank you a lot for the video!

I swear I saw a video that time appears to be flowing forward, because of our perspective. When in all actuality, it's flowing backwards, and that's why events are layed out in one direction of existence of already have had happened. Or rather, only appears to have already happened.

Thank you for crippling depression, I'll go cry now.

Time is an invention of man. A unit of measurement like length. We didn't create space but we can measure length. Similarly we didn't create direction of events and cannot change it's flow.

What would happen if entropy is at it's max?
If the increase of entropy is the only physics law stating how time should move, and entropy can't increase anymore. Does time stop moving?

But when a star becomes a black hole doesn't the entropy decrease since everything is gravitationally held orderly

okay dude TENET is a mind fucking movie that I needed watch physics

"Hot, dense, smooth and rapidly expanding"
oh, he may be me

Everyone is here after tenet

You can't say with certainty what will happen with the universe on such a large scale. It will turn into nothing? This is funny. Here is a thing about Nothing- it doesn't exist. Never. Universe does.

If we kept switching randomly between forwards and backwards, one side won't remember the other cause the neuronal connections made while learning something will be undone...right?

We move from lower entropy to higher entropy because there are more configurations possible for an even spread of energy than for a concentrated spread of energy (The quanta of energy keep moving and there are more chances of them being evenly spread than being concentrated in a place... a bit like the birthday paradox)- it is all about calculating probability and which state is more likely to occur. Ted-Ed has a very good and understandable video on entropy.

Who's before Tenet <•••••••

Grandfather paradox .