The Twins Paradox Primer (Rotating TIME!)
ฝัง
- เผยแพร่เมื่อ 18 ส.ค. 2016
- How can time be slower and faster at the same time? Thanks to www.audible.com/minutephysics for supporting MinutePhysics
This video is about the famous “Twin paradox” of special relativity, and how time can appear to be faster for two different observers at the same time.
Thanks to everyone who supports MinutePhysics on Patreon! / minutephysics
Link to Patreon supporters here: www.minutephysics.com/supporte...
Music by Nathaniel Schroeder, / drschroeder
REFERENCES
Muon lifetime and time dilation/relativity: hyperphysics.phy-astr.gsu.edu/...
MinutePhysics video about Time Rotations & Einstein: • Einstein and The Speci...
Experimental test of time dilation using doppler shift of light: en.m.wikipedia.org/wiki/Ives-...
Lorentz Transformations: en.m.wikipedia.org/wiki/Loren...
Relativity of Simultaneity: en.wikipedia.org/wiki/Relativ...
Paper on twin paradox under constant acceleration: arxiv.org/pdf/physics/0604025...
Taking Cesium atomic clocks aboard airplanes: en.wikipedia.org/wiki/Hafele-...
Length Contraction: en.wikipedia.org/wiki/Length_...
MinutePhysics is on Google+ - bit.ly/qzEwc6
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich - วิทยาศาสตร์และเทคโนโลยี
Ohh I get it...
Except I don't.
Ya I hope I'm not the only one who doesn't understand half of his videos!
I don't blame you, to truly understand these things you have to have a grasp of the mathematics behind it. Likewise, to truly understand the Schrodinger's cat allegory you have to have an understanding of the mathematics behind it.
Don't worry, you're not the only one.
It's easy to understand ..
+wind I get the concept, but my mind doesn't wrap around it.
Can you answer the "work paradox" where the last five minutes of work is longer than the 1/2 hour we get for lunch?
Finally someone speaking my language.
Why are Mondays longer than Fridays?
+Saunterblugget Hampterfuppinshire why does Kevin always nick my scotch eggs
Not true, it always depends on workload. My theory is that time passes slower the more work you have to do.
theviper1999uk lol, Kevin's the name of my cousin. Wait... we're all cousins!
I like to pretend I understand these videos
+Udit Guptaa you're pretending too right?
+Alphonse Loeher I am pretty sure he is not. Special relativity is taught in most physics undergraduate curriculum, and a highschooler can easily understand the basic concepts. Why is it a fashion to boast about ones ignorance? If you don't understand, why not try to read a book or the wikipedia article instead of pretending to be a cool hunk?
+subh1 You tell him!
I TRY SO HARD!
For all you guys who are saying you don't understand, look I know why, I had been there. First gather all the base knowledge and accordingly the time. You know how much you can grasp so 6 to 3 years is a nice time to gather all the base knowledge and then watch minute physics. These are vids for ppl who already know what is happening. Watch kurzegast, life noggin, physics girl, second thought, play noggin and read a lot of books like The grand Design and stuff. Read PDFs online and then watch this channel.
I'm sorry and IMMA let you finish, but my giraffe is the tallest giraffe of ALL TIME.
Badum Tsssss
TGOAT
Now look, some people have insinuated I have a small giraffe. And they're saying, they're saying if his giraffe is small, something else must also be small. Let me assure you that is NOT TRUE.
300 likes on this comment? Jeeees..
yeah right
I'm just going to pretend I understood this and continue with my life
You don't have to. It's just shitty pseudoscience.
Ye.. This videos basically pointless. Youll find alot of his vids are pretty basic shit just taken to the next step.
Wait, did you say general relativity is pseudoscience? Sure it's pretty basic explanation (hence, *Minute* physics) but I don't think you mean it that way do you? This isn't your "big pharma conspiracy get alternate medicine instead" pseudoscience isn't it?
+22 shhkadeeww ok good to know I won't worry about this
pseudoscience? just because you don't understand it doesn't mean its pseudoscience, because its not
I liked the background music. Felt like I was watching Steve from Blues Clues draw in his notebook.
***** relax
+Tree Of Isolation yeah, you overreacted
+Clorox Bleach yeah, drink it all the time
+Clorox Bleach especially when I watch drama aalert
Ok, so that's how tall giraffes are on your tiny planet. But how tall are the baobab trees?
Those are actually Celestial Giraffes and they feed on space debris.
Oh my god, I can't believe I actually get this reference now...French class turned out to be useful after all :p
@@KindredBrujah don't insert anything into wormhole safety has founded
an okay to be smart comment with only 33 likes? unheard of!
Lol
I am nodding and smilling as I got everything you said. But inside Im crying because I feel dumb for not understanding a single thing.
For all you guys who are saying you don't understand, look I know why, I had been there. First gather all the base knowledge and accordingly the time. You know how much you can grasp so 6 to 3 years is a nice time to gather all the base knowledge and then watch minute physics. These are vids for ppl who already know what is happening. Watch kurzegast, life noggin, physics girl, second thought, play noggin and read a lot of books like The grand Design and stuff. Read PDFs online and then watch this channel.
@@ayediti5757 you literally have maxmillianmus as your profile lmao. its so funny seeing a troll pic giving advice
Take it easy with the background music. It's way too loud and invasive, especially if you're watching/listening on speakers with a sub. Other than that, great video as always.
STFU, No one likes you.
EDIT: JK, Yea that's right. It's a fucking joke.
cant take constructive criticism....?
+_iNyx wowowow
i didnt have the same problem, it was fine for me
+_iNyx Lol. So you can't even write your own opinion in the comments without being insulted?
Well it worked in Ender's game, didn't it?
MY MAN
It did indeed!!
Well in the Enders Game series the ships are traveling either traveling at the speed of light or close to the speed of light, it changes based of different books.
Love that book
haha, I was thinking the exact same thing. Funny how out of all the science fiction books that use that "traveling quickly means you ago more slowly" idea so many people remember that one.
I enjoy these videos but, sometimes I feel like I'm too dumb to be here.
yeah i get most if not all of these videos, except for this one. I didn't really get anything new from this video, cause i don't understand it
so basically we all have different "relative times" but the same "real" time.
+Mish. Michelle Oh. Thank you:)
I feel the same
+DynamicHunter same
I remember learning about this in advanced mechanics and being mind blown...
"It's that you rotate time..." Uh, okay that's kinda where I left mentally.
Edit: 1:11
It's really just like rotating anything else. If you lie down you're only a foot tall, but you get very wide. (Compared to someone standing up of course.) So if you 'lie down in time' the time you experience is shorter but you move through more space.
Gareth Dean Oh, because time and space are tied together right? Still weird and complex, but makes 10% more sense now, thanks.
Stray Pay
Yeah, it can get a bit odd like that. But there's a sort of sense in it, if you're running about in space you have to slow down in time, if you slow down in space you can move through more time.
Yes, the same way electricity and magnetism are tied together.
I think he meant "spacetime".
"Take a look at my giraffe !"
-Henry Reich 2016
One thing glanced over in this video that might help people understand - in the part about simultaneity, it's necessary to consider how long it takes for information to travel between the two travelers. When he says "when 3 seconds have passed on your clock, you'll measure only 2 seconds having passed for me", this is including the time it takes the light from his clock to reach you, which now needs to be considered. You can't measure "simultaneous" events without sending information between the two places in question. That transmission takes time, and goes at the speed of light. Think of the orange and blue dashed lines as the images of the stopwatches traveling towards the stopwatch of matching color. So from blue guy, the light from his watch travels along the orange path toward the orange guy. So orange only "sees" the blue watch saying 2 at the time his says 3. In this diagram. the vertical axis is time.
Congrats on 3.5 million subs Henry! You make great content and deserve all of them
It's the acceleration when u turn in the ship that makes it not a paradox right?
exactly. the twin that leaves will be in an accelerating reference frame. once when they leave earth and again when they turn around
I have heard that this is the answer too. But why does that matter? What is it about an accelerating reference frame that solves the paradox?
What's an accelerating reference frame?
+NWRIBronco6 i think it's because acceleration (gravity) also bends time
+NWRIBronco6 I'm not a physicist... But from what I know is that because of acceleration, during that time the person can't be considered a reference point.
If both are at rest, either can be a reference point, so for them it will look like the other is moving, therefore times is slow for them. But as soon a acceleration/deceleration comes into effect, the one that is changing velocity can't be a reference frame anymore... so we only have one reference frame, so the accelerating twin will experience time more slowly.
Brilliantly explained!
I remember reading about the twin paradox in an old H.C. Verma book. Took a long time to understand but is a fine example of Special Relativity.
It's a load of bollocks
"When you change your speed you rotate the direction on time"
LOL
Rotations in speed actually were what Einstein did with uniform translations in constant velocity to get general relativity. But even Einstein did not try to rotate time ..
UTTER HOGWASH
Great video, as always! Funnily enough, I just uploaded a video on the same topic (explaining the twin paradox in special relativity). Only, that you got in 3 hours the same number of views I got in 3 weeks!
I'd say the best video of yours this year. Interesting topic, great presentation. Good job.
The paradox breaks down if you consider that general relativity only accounts for frames of references that are not accelerated. But your twin accelerates at the farest point of his journey to meet back up with you, so his frame of reference is a different one to when he started.
It is the energy and momentum of the reference frame that forms the time dilation. The traveling twin has the greatest energy therefore the slowest time in his reference frame. We can think of this as a process of continuous energy exchange or continuous creation with a future relative to the energy and momentum of are own actions. This is the idea that this theory is promoting that the wave particle duality of light and matter in the form of electrons is forming a blank canvas that we can choose how we interact with forming a future of our own choice relative to the energy and momentum of our actions.
You mixed up special and general relativity, but I think this explanation is in essence correct. Also, from my understanding, special relativity CAN deal with accelerations, just not with gravity. You don't need general relativity to explain this paradox.
Nigga what??
Ok, but what if instead of returning the twin beams their clock signal to another rocket heading back to Earth? That rocket then carries the clock signal back to Earth with nothing having accelerated, yet as far as I can tell the clock will still behave as if time on Earth had passed faster.
If you truly only send a "signal"(meaning a beam of light, etc.) than Earth time will have passed slower relative to you like normal and vice versa. If you send the clock itself, than the clock will have accelerated.
As the twin needs to return to you, doesn't it effectively reverse any time difference? As the two relative points of view cancel out?
my guess, too.
that was gonna be my guess too :)
+Alex Hulse Yes but the guy who flys away has to return to earth, so relative distance travelled will be 0 for both... Distance/Time is speed, with 0 distance you end up with 0 relative speed difference. I might be wrong :P makes sense to me.
+hxduck and with 0 relative speed difference the time experience for both twins is the same?
The earth is both of their frame of reference. Therefore there is no argument over who is moving and who is stationary. The astronauts in this case would age less than those left on earth.
I have taken a GR course and this still absolutely blew my mind. No one ever explained this so clearly to me.
This is great. The visualization really helped. Thank you, Henry!
As I travel away from you on a rocket, both you and I believe that the opposite person is experiencing time at a slower rate. We both become redshifted to each other.
When the rocket begins its return journey and I travel towards you, we both observe that the opposite person is experiencing time at a faster rate than the observer. Light becomes compressed between us and blueshifted as the wavelengths of light received appear closer together.
Perhaps a simpler explanation(if I understand correctly), would be if I was traveling in a car that beeped its horn once every second. If I got into the car and drove away from you at the speed of sound, the beeps would be heard by you every 2 seconds rather than once per second. Every time the car beeps, it takes the sound an extra second to reach you than the previous beep because of the extra distance.
Now I turn the car around and drive back to you at half the speed of sound. You would now hear the beeps every half second because I have traveled half the distance sound does every beep.
When we finally meet, we would both agree that the car honked it's horn the same number of times.
Youre not answering the question
+Adam Zidane Well, the second question not the first. Because of relativity, the observer on earth will experience time at a slower rate than the twin farther away in space because of earth's gravity. Unless, the twin in space is moving at a high rate of speed, in which case time would likely elapse slower for him. If you were to hover in space above the earth, time would move faster for you; if you were in low earth orbit instead of hovering, you would be moving so fast that time elapsed slower for you.
Regardless, the observers don't have communication faster than light speed. If they could communicate instantaneously, they would indeed both agree on which twin was experiencing time at a faster rate. When an observer is traveling away at some fraction of the speed of light, light and thus the observation of events are stretched between them and they both observe the opposite twin experiencing time slower. As the observers approach each other at a high velocity, the light and speed at which events seem to be occuring for the opposite twin compress. It isn't until the two twins meet again and they share the same frame of reference that they can finally decide who's time dilated the most.
It is a doppler shift of light, redshift and blueshift.
+Vinay N.K For example, if I move away from you at 50% the speed of light, time will dilate by 0.15 seconds per second for me. But, because we are moving apart, we both observe a 50% decrease in the opposite due to speed alone. The actual time dilation is negligible until we are in the same reference frame.
Corrected for doppler shift and time dilation, you stationary and me traveling away at ~0.5c- I will observe you experiencing a second every 1.725 of my seconds. You will observe me experiencing 1 second every 1.275 of your seconds. We both observe the opposite observer is experiencing time slower than us.
If I am approaching you at .5c-
You appear to be experiencing 1 second of time for every .425 seconds that elapse for me, where as I appear to pass 1 second for every .575 seconds you experience.
@@SpecialEDy joseph priestley yes we need adding that too
I clicked on this video when it had been uploaded for four seconds. Damn.
You might have a little too much time on your hands, bestie.
I clicked on this comment when it had been commented for 14 minutes. Damn.
Damn.
and here I am, 14 hours after your post
You have a strange way of saying " FIRST!!!11!! ".
this video made me confused about time dilation...now waiting for next part!!
You made my day! I love watching videos that give me a new way to look at things I have studied.
The Twin Paradox isn't really a paradox because the twins rotate back to the starting point (that is, start from and return to the same inertial frame of reference).
That's what i thought too. But it still seems wrong. Because if you see the time of your twin going slower, yet when he arrives the time is the same, at some point his time has to accelerate and go faster that yours. And it seems impossible if time goes slower when moving relative to the other.
Besides from what i understand, being in the same frame of reference means that both measure time the same, and has nothing to do with the total time counted during the whole trip.
That is the problem. There is something missing here.
+DrBernon The trip out and the trip back will appear to take the same amount of time to the Earth twin, because his frame of reference doesn't change.
The trips out and back will also take the same time according to the twin on the space ship, but they will be shorter compared to the time measured by the twin on Earth, because the space ship twin had to accelerate to reach his frame, and the Earth twin did not. So when the space ship twin returns, he returns to the Earth twin's frame, but the Earth twin has never left his frame, so they agree on the Earth twin's frame of reference, and thus his measurement of time.
If instead, the Earth twin accelerated to catch up with his brother, they would agree on his frame of reference, and the Earth twin would still be older, but not by as much.
If you look at it from the rocket perspective it is the Earth that is moving away and then returns. So there is symmetry to the paradox.
Miner 2049er The Earth doesn't accelerate (besides its orbit) relative to its own initial frame, but the rocket does accelerate and then decelerate, relative to its initial frame of reference.
Also, while Earth's speed relative to the speed of light in a vaccum stayes roughly the same, the rockets doesn't. I'm not entirely sure, but I feel that makes a difference.
Okay people, this is basically Interstellar, where McConaughey stays young in space and his daughter on Earth gets old.
Hope people get this now!
***** are you from CinemaSins?
noooooo its not that.... :((( im so triggered at reading this comment, it was GRAVITY, THEY EVEN SAID IT LIKE 3 TIMES IN THE MOVIE, McConaughey was not moving fast enough for that kind of things.
SkyDancingleaf
ok
I've seen so many videos on this yet I still find myself pondering something new each time.
Infinite respect to everyone who can understand 100% of this video and all the others. Henry, good job bro.
Is time really real, does anyone know? Maybe time's just a construct of human perception.
Find out next time on family feud
Yes... it is real... has been proven by experiments. In fact... GPS has to account for time dilation.
ma ma ma ma Ma Ma MA MA MAAAAAAAA!
Time is a physical thing, we can sense it, but how we perceive time to work with our senses is not how time really works. That's what physics is for.
The real question is: Do Aliens really exist? Yes, I'm from Jupiter.
Damn, i have a Giraffe now. I guess this is my life from now on
I think U almost understand it better now. Almost! Your explanation is nicer than many vdo I had been watched.
Thank you!
The twin paradox isn't a paradox becuse when the rocket twin turns around he is experience acceleration which removes him from an inertial reference frame. Special relativity only works in inertial reference frames.
There is some debate over whether or not special relativity works in accelerated frames. It certainly does to a first approximation, but one has to be careful about the type of coordinates one uses. A better explanation of what's happening is that when the faraway twin turns around, he (or she) is *changing* inertial frames, and this affects the synchronization of faraway clocks as observed by that twin. This means it affects the ability of that twin to continuously measure time elapsed in faraway places, such as the earth. If this astronaut twin tried to record the aging of his or her stay-at-home twin on a space-time diagram, there'd be a big gap where he/she has changed inertial frames. In this way, both can observe the other to be aging slower while at the same time, the twin on earth ages more than the traveling twin.
twwc960 Cool, thanks!
+Kai Widman yeah...cool...
What happens if the twin traveling does not turn back, hence does not change inertial frames? Does the traveling one still age less?
In that case, both twins observe the other to be aging more slowly, but since they'll never meet up at the same place again for a direct comparison of ages, no paradox arises.
Red shift is caused by the Doppler effect, not time dilation. Or you just proved the big bang wrong...
I thought so too!
It's caused by both. One can't explain the entire shift.
doppler effect:
-red shift if it moves away,
-violet shift when it moves towards you
time dilation:
-moving objects always redshift (a little)
Blue shift not violet shift, obviously haven't watched the rainbow video.
+alexander reusens blue shift*
the twin who leaves the earth will agree less as in order to return back to the earth, he/she have to take a U turn which means there is acceleration involved in his journey. so from this we now know that time runs slow for the twin in rocket than the twin on Earth. this is why the twins paradox in not a paradox anymore!
*age.....not agree! my bad!
yes you're right I thought of the same solution before I opened the commant section
But... Its still the same time tho-_-
+22 shhkadeeww the paradox only works if there is no acceleration so since the person that went in outer space had to turn back there is a change in acceleration therefore the paradox doesnt work.
+Rehatbir Dhingra yea.. But even wit acceleration.. The person at the beginning is still gonna wait til he gets back to stop his timer..so i really dont understand how theres any difference in time
Rotating Giraffes! That's actually the best explanation for time dilation I have ever seen! Thumbs up!
I just want to say this is the best explanation I've ever seen.
Solution: One of the twin experiences acceleration, the other does not.
Acceleration. Bingo!
this guy gets it!
Uhhhh no. Annnnd no.. Relative distance traveled is 0. And speed is Delta D/T. Acceleration has nothing to do with the twins paradox.
+David Bloom I bet my two balls the answer lies in the fact that only one of them is accelerating.
+David Bloom acceleration has literally everything to do with the twins paradox. Lol
ITT arrogant people with no physics experience claiming decades of scientific research and application is wrong and doesn't exist
Hey, I am an ITT guy who started out at a physics major... and I don't think this is wrong at all. In fact, I thought his comparisons were very elegant and accurate.
You have to understand though, Programming is a very logical field of study, you have to achieve whatever is necessary while simultaneously being bound to the bounds of your box. It is no surprise that many would like a more logical explanation for things, even if it fails to have the predictive strengths of accepted science, just let them think they have the 'real' answer ;)
It happens, you should see what happens when physicists eave their field and think they can revolutionize things like Biology or psychology. (No, you see we can use Dirac statistics to recreate the first human language!)
Richard Smith ITT = In This Thread
Wasn't referring to the field of study.
+ImagineBaggins but this isn't a thread, it's the comment section of a TH-cam video.
(IK I'm just poking at you :p)
It's *RESEARCH* OR *BE RESEARCHED*.
litterally watched a video on the twin paradox last night....parallel production is a mighty thing
I have a physics degree and this has just cleared a few things up for me, thanks Henry :)
This relative time-space thing gives me a headache. I want to understand it but it's just too confusing:(
Is it when the ship turns around it must decelerate and accelerate again, negating special relativity?
Kinda. It's not really about the changing of speeds but the changing of directions. It is entirely explained by special relativity though.
Essentially the situation isn't symmetric, despite how it looks. The person on earth has one frame of reference, that of the 'stationary' earth. The person on the ship has two relevant frames of reference, stationary with the earth moving away from them and stationary with the earth moving towards them. It's not because the earth changed directions, but the ship did. Ends up that the person on the ship aged slower as a result.
E Mc73 Thanks!
+E Mc73 Correct me if I'm wrong, and I may be, but doesn't the amount of matter around you effect time as well? Shouldn't the earth and all its mass speed up time for that twin? Is this at all important to time rotation?
To be honest I never really learnt about that, sorry. Does sound like one of those things that'd end up being true, though. Like, there wasn't a mass term in the relativistic factor I learnt at uni, but I've heard stuff about mass warping 'space-time' so, yeah, sounds likely.
+Daniel Wells Yeah like from the movie Interstellar, as they approached the black hole, time slowed down. I presume that you'd have to be near a much larger mass than the earth in order for it to have any measurable effect, like a star or a black hole.
Thank-you for doing the Twins paradox, Henry. I mostly understand the whole stretching of time and space thing when it comes to observing the behaviour of fast moving objects, but I don't understand why one twin ages more than the other. I would have thought that since neither one's motion is absolute, both of them would observe the other age more slowly and would only "catch up" during the deceleration somehow.
I suppose that using the rotated time analogy we could draw each trip's timeline as a line (vectors) where the twin on earth has 2 lines of of the same length in a straight line while the other has 1 line rotated at an angle, with the second line pointed back to form a triangle. If all line segments were of the same length (representing say a year as perceived by each twin) the one going straight (who did not accelerate and decelerate) would be longer than the one that bent off at an angle (representing the trip away and back). Still this method seems to imply that the earth twin would be younger than the travelling twin- which is opposite to what the actual result is...
If someone can find out where I went wrong and explain why the "travelling twin" can't view the "earth twin" as the one who is actually moving (and therefore arbitrarily rearrange the vector diagram I describe above) I would be very grateful.
Stunning as always.
The video starts at 0:00 and ends at 2:50.
thanks!
Aw thanks man!
A real life saver!
Thanks so much man
i think it ends at 8:12
27secs in and I'm lost as fck :/
As a senior physicist I always find it amusing the ways minute physics does his best to try to explain relativity to non physicists :)
i used to be able to follow these explanations... but this one flew way over my head
"Says who?"
The polls. All of them.
Tara. Which poll?
XD
Why did i watch this all the way if i didnt even understand it...
Because you wanted to understand it. Wanting to learn is a good thing.
yeah you gotta think about it , its good for you logically if you can think more logically
I never thought of it like that, thank you
Oooo I will toon to the next. Good stuff sir!
Exemplary! A key, really intriguing concept of special relativity explained in just about two and a half minutes. This can be figured out using the Lorentz transformation, but the conceptual side of physics is much more important than the mathematical side in my opinion. Well, Einstein himself said that science is just an extension of everyday thinking. Keep making great content like this!
Your videos are so hard to understand. :(
Well he's trying to explain something you can study for years in a 2:50 minute video. Rather difficult if you ask me.
Try to watch with 0.5 speed and repeat the video if need. Or look up for the subject on google.
No their not scrub
+Adam Zidane says the one who doesn't know the difference between they're and their...
Adam, the world awaits your elegant explanation of this concept.
P.S. Just make sure you have an editor for your paper.
all i heard blah blah time blah blah giraffe blah blah time....relativity is a bitch ...
The giraffe analogy is simply beautiful!! It should be the introduction to every chapter on special relativity in every physics book. But it should be taken with a grain of salt, since Euclidean rotations are remarkably different from Lorentzian rotations.
Yea I get it. I understand every word and sentence you say in your videos. I even try to find solution if you ask a question. I teach others what I learn from your videos. Your explanations have helped me in my daily life. In conclusion- I am a smart guy.
I live in a world full of ignoramuses. Take a look at the comments section, and you'll quickly know what I mean.
I gave a thumbs down. Love the topics covered. But I want to have a chance to take a breath and try and digest some of the concepts. Sure it all sounds logical - in a stuff it down your throat way. I honestly don't like choking when I am trying to learn. And this applies to all of his videos. He comes across as not teaching but telling you how it is (whether you like it or not).
You made me understand it deeper !!! Thanks a lot
Very good introduction for your next video, but felt like the title meant I was going to learn about the twins paradox rather just briefly be introduced to the idea that it exists as a concept.
Its all a lie! Turn to Jesus and save your souls!
im atheist but i pray no one gets pissed off by this
Being a Christian myself, how do you know God didn't design the universe to function in this way? Where does it say all science is false in the bible. I beleive science is discover the systems and function God has setup for this universe to be able to sustain itself.
LIES! ALL LIES! God created people from clay 10000 years ago! Our blood contains iron, iron comes from the soil, soil = clay. Boom!
***** I don't even remotely understand what you're trying to point out to me.
ThatOneBrony He is pointing out the fallacy of your statement that usually religious people make in these debates.
The world works by proving or asking for proof of things being one way or another. Instead you say "how do you know god didnt..". The real question is - "How do you know god DID?" And the answer is very simple - you dont, you made it up and/or selectively choose to believe it.
Might well ask - how do we know you didnt help bin laden plan 9/11? And by your own way of argument - you did unless you can definitively prove you did not. Which you cant really do. Ergo - you are guilty.
That is the level of argument you and most other religious people make. Though I doubt you have the mental capacity to understand the problem with your approach, as most religious people.. which is why they are who they are.
I had a dream that I handed in a major assignment, them had a nightmare that I didn't, so I woke up at 3:30am to make sure. In the morning, when I properly woke up, I didn't know if I dreamt if I did it, or I actually didn't. Long story short, My mind is fucked thanks to you. Keep up the good work.
Great way of explaining this. I love it! and thank you for not saying 'primmer' once.
I love the paradox so many questions but no real answers which is why I love it
If anyone could actually hear my brain working, minus the stickmen, this is what it's like. Manic, confusing and lacking the ability to slow down. "The hypomanic brain is like a Porsche with no brakes." I don't know who said that, but someone did because I cut it out of a magazine and taped it to the top of my monitor. I'm happy to find "others" I can relate to even if it's just through their videos. Lol! This was great, thanks!
Finally back to the good stuff!
Very well done. Thank you for your efforts.
The rocket turns around (assume infinite acceleration = instant u-turn). Before turning around, the skewed lines in the video go just like in the video. Right after the u-turn though, the skewed lines shift (according to the rules also applied in the video). This shift in the lines goes "up", resulting in a sort of time jump. In this jump, time "jumps" forward for the earth, resulting in a younger rocket twin.
When i was little, we had a poster on our school about space, it had descriptions of things like supernovas and red dwarfs. But it also said "Fun fact: if twins we're seperated, and one was sent to space to come back 18 years later, the twin on earth would be a normal 18 year old, but the twin we sent to space would be an 18 year old baby. It wouldn't have grown." I'm not sure if it's correct, but it reminded me of it.
It's because of the relation of time and speed in special relativity, on the rocket ship's turn around it accelerates {Change in velocity/Time}, the acceleration is where ALL of the "aging" happens since a change in direction is also a change in velocity. During the acceleration the twin on Earth will age in proportion to the speed of the travelling twin due to the Lorentz factor
That explanation was amazing!!!
I need to watch these videos multiple times just to get a slight understanding of what he just said
An outstanding example of how diff people have diff perspective with time travel!!
For all you guys who are saying you don't understand, look I know why, I have been there. First gather all the base knowledge and accordingly the time. You know what your grasping power is so 6 months to 3 years is a nice time to gather all the base knowledge and then watch minute physics. These are vids for ppl who already know what is happening. Watch kurzegast, life noggin, physics girl, second thought, play noggin and read a lot of books like The grand Design and stuff. Read PDFs online and then watch this channel.
Great explanation ! Thanks for the video
Awesome video!
Wow that was actually such a good explanation
so this video is called the twins paradox, but you're not gonna talk about it in this video.....
makes total sense.
Great video, as usual :-)
Hm...can someone explain, in the giraffe example, y is the 3rd unit from centre of circle in first scale joined to the 2 nd unit from centre in the second scale? ( Why not the any other pt on scale ...like say 3 unit itself ? )
Hey i had a question.. so you know how a belly flop hurts? like the water tension ( i think thats what its called) makes the water hit like concrete? but, what if the water wasnt still so the water tension was really low? what if you belly flopped into a stormy ocean with huge waves thats super unsettled?
Can you do a video on how exactly time rotates (Lorentz Transformation) and why it works like that possibly visually using your beautiful way for explaining concepts easily in a short time but without leaving out information?
Is that why the 18 hour drive that I have to endure every holiday feels more like a 24 hour drive!!!!
Sometimes I feel as if I grasp these videos intuitively, but when I try to explain it back to myself or puzzle it out, I completely lose it.
I get it now!!! Time is adjacent to the morphosis of the cuadron's hypervelocity and squire. Because the theory of drill-lacing is set off at an acute intersection with the photon's membrane cell. So that means that the gazelle effect goes par with the nebulous radius of the parallelogramic friction resistance! It all makes sense now!!!
Great explanations!!! :-)
same age time slows then speeds up on return. but what about the movement of the earth. what if one twin leaves earth really fast in one direction, but turns around before he has gotten too far. So on his (or her)return he is going in a direction that is not the opposite to his 1st direction?
The twin that stays doesn't travel (or at relatively low speed if you will), and the twin that leaves goes nearer to the speed of light, slowing down time for him. You could mirror this and say the one who leaves stays "still" relative to the other, however you know the one who is really travelling because he has to accelerate to get back to earth.
Hey smart people. I have a question related to this.
If there are two objects, A and B. They start in the same place and accelerate away from each other until it appears from A that B is moving nearly light speed. They travel like that for a while. Then A accelerates to the same velocity that B has so that they are in the same reference frames.
What is the effect on their time relative to each other and why?
Can you do a video on Time Dilation? Would love to
see how you visual describe it.
I understand these video. Thanks
The twin who left Earth and came back changed frames of reference, and time dilation works differently when acceleration is involved. I don't remember exactly how it works, but I read good articles explaining it. Look up "twin paradox solution" and click on the link for Scientific American.
My understanding of the Twins Paradox is that it resolves itself via acceleration. If the near-light-speed twin just kept moving away from the other one at a constant velocity forever, then they'd never be able to reach a conclusion as to which aged faster, but that's not what's happening. The fast-moving twin moves away for some period of time, then has to change their velocity to turn around and come back, while the other twin remains in a single inertial reference frame the whole time. This breaks the symmetry and allows there to be a period where both twins agree on who time is moving faster for. (Of course, remaining on Earth isn't actually a single inertial reference frame, since it's rotating and orbiting and such, but those forces add up to a tiny fraction of the acceleration that occurs when reversing trajectory at near light speed.)
I don't know if any of that is right, but that's how it was explained to me when I looked into it. Looking forward to the follow-up!
I didnt understand one thing you said, but it must be very interesting!
well at the begining one can take any one of the siblings as a reference system, thats why they both see that the other ages less, but the things happens when the traveling sibling wants to stop and go back, because he changes speed he can't be anymore a reference system because of acceleration.
This makes my brain explode.