I’ve been a geophysicist for 45 years. I must thank you for re-instilling the sense of wonderment I felt in my younger days. I watch your presentations then find myself pondering it all in those quiet times of contemplation when hiking or cycling.
I love your emphasis on the Heseinberg uncertainty being a consequence of wave mechanics as opposed to an observer effect. As a physics student I can attest this misconception is everywhere in pop science ! Great video all around.
Saying something is "uncertain" is not an answer to any question. Saying something has a point origin at an event horizon, at least makes an attempt at a definitive answer. You might not like the "observer" explanation, but it is a more rigorous definition of reality. "Limitation of what we can know," vs "limitation of what we can measure" is just semantics. It is the same thing.
@@dialecticalmonist3405 what are you talking about ? its quite obvious you have no scientific training, I'm sorry, read up on the Heisenberg uncertainty principle, Fourier transforms and an undergrad QM book (I recommend Griffiths) and I think these concepts will be much clearer. This has nothing to do with dialectics, its a mathematical property of wave packets.
I agree with the other comment here, I cannot express how grateful I am for having discovered you. Really like your style of explaining complex problems.
Your animations about physics are some of the best anywhere. I love how you point to formulas and break them down. How long does it take you to make the animations? Do you do them yourself? Either way it is very impressive.
@TheZone An average atom has a radius of 0.1 nanometers. A solid 1'x1'x1' volume would have something on the order of 10^23 atoms, each with their own wave functions that would have to be nearly perfectly in-phase which each other to produce a noticeable effect from our perspective. If you had a ball of 10^23 tangled rubber bands, how difficult would it be to lay out every single one in a neat grid?
@@markjapan4062 According to Muhammed Abdul, (paraphrasing): there are Muslims in the East (from Egypt?), but not Islaam, whereas there is Islaam in the West but not Muslims.
After another 1000 explanation clips or so I just might start to grasp this subject. It's so fascinating but so confusing. Keep up the good work Arvin!
This video should be in the top-5 videos one should start watching to get familiar with the quantum world. Thank you so much Arvin, you are doing an amazing job in educating us!
What a marvellously clear capture of the information related to the question asked - provides guidance (frameworks) for ongoing and greater explanation in the area. Thank you. You are tops, so very across the material.
Absolutely superb demonstration ! I am sure this will encourage students (young and old) to get into the maths and physics to get a greater understanding and appreciation of quantum mechanics.
It should be noted, decoherence is often quoted as a solution to why we never see quantum behavior on macroscopic scales, but this isn't the full story. Decoherence is just a term used to describe what happens when a huge quantum system's many parts interact, both with each other and with their environment. Everything gets scrambled up, and the system's parts begin to behave according to classical probability rules instead of the Born rule. What this does model is the emergence of classical statistical mechanics. But there is no mechanism that decoherence provides that explains the quantum measurement problem. As a system begins to interact with its environment, the state of the system, at least in principle, remains stuck is a massive entangled superposition, all the way to the macroscopic level. Interactions by themselves do nothing, according to Schrödinger's equation, to force a system to leave a superposition of states. This only appears to happen (for some reason) once the system interacts with measurement devices. Therefore, it's still an interpretive question, and an unanswered one at that, to ask what the state of the system at large scales.
Can it be explained as entanglement? I think this is something that Susskind is saying. The system under observation gets entangled with the particles of the measuring instrument.
@@b43xoit You may be describing one of two things with the words "entanglement" and "Susskind." One is the idea of Everette's interpretation, which is that the universe splits in some sense. Different branches of the entangled wave function describes different outcomes of a measurement. The other thing you could be referring to is the ER = EPR conjecture from Susskind and Maldacena. So, I'd ask to clarify what specifically you're referencing here.
@@jmcsquared18 I don't know about an entangled wave function having branches; that's farther along than I have studied to. My understanding is that for any given pair of particles, there is no entanglement, full entanglement, or partial entanglement, and these things can be inferred from measurements, at least partially. And when I refer to Leonard Susskind, I'm not referring to the conjecture you cite, necessarily. Just the material he states here on UA-cam.
I cannot wait until you reach one million subscribers. You deserve it 10 times over. I love your explanations so very much! Thank you very much Arvin. Don't worry it will happen very soon I hope. You are the best physics explanations on the entire you tube by far. Absolutely love you!!!❤❤❤
Thanks for the excellent presentation. Another analogy for the Heisenberg Uncertainty Principle I like to use is detecting audio at different frequencies. You can easily detect the start and stop of a high-pitch noise, light the "high-hat" sound in dance music. Low-frequency tones (20-30Hz) are so spread out that it's far more difficult to tell where they start in time. In typical music, a bass thud is really a short high-pitch impulse followed by the long bass note to give the listener a better sense of when the "beat" starts. Keep up the great videos!
Nice. That's a good analogy. But aren't the low frequency tones generally pressure waves? Or more correctly, sound vibrations are pressure waves. So, can we consider the Energy-time equation of the Heisenberg's Uncertainty to deduce the analogy you have given? Because I think that Position-momentum uncertainty will become vague for understanding this. What do you think?
Outstanding as usual.Your videos excite me like a little child wanting to learn the mysteries of the universe.I'd love to meet you in person & discuss physics.
What a great, intuitive explanation of why we don't see quantum behavior at our macro level. How is it that after watching dozens of other videos from various creators about the quantum world, this is the first time I've understood the quantum/macro relationship?
This is the first time I have understood why large objects don't act like quantum objects. I was stuck on the idea that it must be a perception problem of different scales of existence but your wave function interference cancelling each other makes sense.
Except that the double slit is not a quantum phenomenon. A quantum phenomenon either has Planck's constant in it somewhere or it requires multi-quantum correlations like entanglement. ;-)
That! Is why people have difficulty understanding the Quantum World. Because we view it in terms of own perspective of life. This video serves to bridge the gap between the micro and the macro! It well pioneers a very good way of approaching Quantum Mechanics!
Re the uncertainty principle: I think that's actually one of the least "weird" properties of "quantum world". Because it's simply an inherent property of all waves, not just the wave function. For example, you can observe a very similar thing with sound: you may have a nice tone, which is a sinusoid wave---so you can easily measure its frequency (wavelength) and that's what defines the pitch. But you can't locate a tone to a singular moment---only to an interval in time during which it sounded. On the other hand, a clap or a gunshot is easily pinned to a moment, but you can't really say what's its pitch; as it's just one sound pressure peak, there's no frequency to it... Same thing.
In the last month or so, I have seen quite a lot of videos on similar topics to this, of which three have been outstanding. Those three include this one.
As a part-time photographer, my way of thinking about the Heisenberg Uncertainty Principle and not knowing precisely the position and momentum is thus: If the shutter speed of a camera is thus that there is no blur at all on the per-pixel scale (Planck-length, I guess), then you can see a photo of a perfectly clear moving object, but you can't determine its speed from the photo. If you have a slower shutter speed, the object will instead be smeared over the picture somewhat, but using the smear and the shutter speed, you can determine how fast it was moving. Even so, the image is blurred, so you can't get a completely clear look at it like you could if the shutter speed completely stopped the motion (and thus didn't allow you to determine the motion). So with photography, you can never have perfect clarity and know the speed of the object at the same time. By the way, I'd be happy to see Frustrated Total Internal Reflection get it own video!
I really wish educators were held to a much much higher standard (& compensated as such). Imagine a generation of people, 80+% of which being educated by people somewhere near Arvin's level.
4:24 THE ball is also interacting with the bat by which, the ball is being hit. Why ball is not passing through the bat's one side to the other? 5:15 Wave function extends till what distance? Are they extended in the entire Universe? 12:25 But light [rays or particles(may be photon) or electromagnetic wave] can go from glass this side(from where the fingerprints are visible, and because visible light can penetrate the glass, but not a human hand, might be it can go from this side(from where the fingerprints are visible) and travel till that person's hand and get reflected back to the eyes, isn't it like that?
In the example where we shoot waves at the wall, and a ball comes back, it would be more accurate to show that another wave comes back, but from a specific point of the wall. It is never “not a wave”, the collapse of the wave function is just the beginning of another wave function.
Thanks (again) Arvin for this video. I always wondered why the double slit experiment doesn't work for large objects, but is does for electrons, while electrons do also interfere with their surrounding. Of course an electron is much smaller than a tennis ball, but is has a charge and mass and even the smallest interaction should prevent an object (electron) to come in superposition. But now I understand that if an object is not a pure wave function because it exists of many waves that are not in sync, it can not be in superposition.
An electron is a single wave, and so behaves like a single wave. A grain of sand is trillions of waves that interfere with each other. It no longer behaves like a wave overall.
Very well explained video! A minor factual nit-pick: you said a squash ball has almost 10^15 atoms. But 10^15 atoms of any substance is less than a microgram.
As a student of physics I was addicted to your channel, especially quantum mechanics . I have a great curiosity from longtime to know about your qualification I mean in which field of physics you studied so that you motivated to make such amazing and elaborate explanations even though professors don't gave such explanations ;if you interested pls replay...
Very will done, Arvin! I'm reminded of George Gamow's Mr Tompkins series. He did a few short illustrative stories on quantum effects if we could see them such as "Quantum Billiards" and "Quantum Jungles".
Thank you for another fascinating video! I 💗 your channel. Thank you for mentioning the subtle point that we are all subject to the laws of quantum mechanics. The same laws of physics are universal. It's just that quantum effects are too small for us to notice at our scale.
Brian Greene's documentaries did this a lot and that's why I love them so much. Like in that documentary where he goes in a bar and says "I'll have what he's having", but its himself he's referring to lol
On our scale, quantum mechanics is effectively the same thing as classical Brownian motion and we can take it that the Heisenberg Uncertainty Principle is replaced by the Fuerth Uncertainty Principle on the same scale. Brownian motion can be replaced by the slightly different Lucretian motion if you like. Such Brownian motion disrupts the Poincare cycle, so we can apply Boltzmann’s H-theorem to a gas without worrying about the objections of Loschmidt or Zermelo. There is no arrow of time issue. This Brownian motion also causes a flow separation at the trailing edge of an aerofoil, so the macroscopic consequences of quantum mechanics can be seen at any airport. For an electron in a potential well, the electron is described by the equations of quantum mechanics, but the well has a bit of classical Brownian motion to reflect the fact that it is a dimple in a macroscopic object. This is one starting point for exploration by computer simulation.
Thank you Arvin, I love the way you explain very complex mechanisms in a very simple way. But I can’t fully agree in your confidence to say that certain quantum phenomena are not applicable in terms of „magic“. See, I stumbled upon your videos on my search for answers to very real phenomena I encountered and still encounter in my life. In my search I also experimented with qigong, and other spiritual or consciousness practices including breath work and visualization techniques and found out in my experience that our mind is capable of much more and we can influence matter as crazy as it sounds. It’s like muscle that just needs the proper training. What I can say is that through some practices, you start to use areas of your brain as well as body in a coherent way that will unlock certain let’s say sensitivity in your perception which will lead your conscious part of your brain or ego to be able to use and manipulate certain aspects or laws of Newtonian physics. Seeing blindfolded also through solid walls for example is taught in Indonesia as Merpati Puthi to almost the whole population. Through continuous breathwork and meditation you Rewire the visual cortex of your brain to use another information channel beyond your 5 physical senses or the signals of your eyeballs. I encourage everyone to try it out for themselves and scientifically try to find out how it works. I just can tell that it works and that the western science and physics avoid to dive into the topic which is ridiculous. Interesting fact, children learn this ability in a matter of minutes, since they don’t have learned barriers in their mind or trained worldview. My 7 year old son was able to see completely blindfolded right after I told him to look for the “information” in his mind. And before commenting this, just use UA-cam and research a little or even better if you live near Utah go to MP USA or watch their videos and the reviews of their students. Thank you Arvin again for your informative videos, I love them! Would love to see a video from you trying to explain just the ability of seeing blindfolded after you learned some of those methods from MP USA. Looking forward for that! 😊
Macroscopic quantum mechanics can explains Paranormal things For example: somatic quantum entanglement explains things like telepathy, observer effect can explains whatever people calls "artistic licenses", and so on
Hmm… in the illustrated example of the aircraft seat, the new passenger only seems to determine whether the first seat is occupied. Surely, there is now still uncertainty about the three remaining seats and their occupancy should still be superposed?
Arvin, what a didactically amazing idea!!! I've never seen anything like this before, and such an animation is immensely instructive for looking at the unintuitive wave properties! A tiny nitpick, at 5:50, about the uncertainty principle (UP), it would have been better to say more unambiguously that the UP had been _estimated_ by Heisenberg and _derived_ a few years later; it's simply the Schwarz inequality between conjugate uncertainties in the position and momentum spaces, related by FT-but you know it, whom I'm talking to! I personally know that many physics enthusiasts who try to wrap their heads around QM believe the inequality has been _postulated_ axiomatically, like, for example, the Born rule has. Possibly, the persistent imprecise wording is due to the fact that Heisenberg didn't derive the formula later named after him, as the Stigler's law (formulated and named after Stigler by Merton, naturally) predicts. He only used an order of mag estimation. Too bad we use imprecise “principle,” “rule,” “postulate” etc. in physics. QM is sheer math, with its complex-valued operators and infinite-dimensional state spaces corresponding to nothing in Nature, that, IMO, it would be less confusing-assuming generously that QM _could be_ less confusing-to use “theorems” and “axioms,” as mathematicians do. “Heisenberg's theorem,” “Born's axiom;” no ambiguity :) Owning a 5-string bass guitar with an added low B2 string (~125 Hz), I often use it as an example: if the player slides his finger up or down a semitone, changing the length and thus resonant frequency on this slow-vibrating string, how much time does one need to recover a new note-i.e, the change in frequency? The answer is derived (with a few technical assumptions) with FT and the same bounding inequality on the time and frequency domain uncertainties: exactly 1/4 of the period. It's a warm-up math before the full UP derivation. :)
I’ve been a geophysicist for 45 years. I must thank you for re-instilling the sense of wonderment I felt in my younger days. I watch your presentations then find myself pondering it all in those quiet times of contemplation when hiking or cycling.
I cannot express how good you are at explaining this stuff, you deserve so much more!
exactly
Yeah, Like I'm being 14 and understanding all of this says alot
@@127-u4l This is proof that magic is real
JESUS BSAID SATAN WOULD APPEAR AS AN ANGEL AND DECIEVE MANY THESE ARE MUSLIMS THERE WAS NO GABRIEL ALLAH THE SUN GOD AKBAR THE MOON GOD...
He actually is. Thank you for videos.
I love your emphasis on the Heseinberg uncertainty being a consequence of wave mechanics as opposed to an observer effect. As a physics student I can attest this misconception is everywhere in pop science ! Great video all around.
You mean "woowoo channels" like Destiny?
Saying something is "uncertain" is not an answer to any question.
Saying something has a point origin at an event horizon, at least makes an attempt at a definitive answer.
You might not like the "observer" explanation, but it is a more rigorous definition of reality.
"Limitation of what we can know," vs "limitation of what we can measure" is just semantics. It is the same thing.
@@dialecticalmonist3405 what are you talking about ? its quite obvious you have no scientific training, I'm sorry, read up on the Heisenberg uncertainty principle, Fourier transforms and an undergrad QM book (I recommend Griffiths) and I think these concepts will be much clearer. This has nothing to do with dialectics, its a mathematical property of wave packets.
I see you are a materialist "scientist."
We don’t really know if it has an effect though
I agree with the other comment here, I cannot express how grateful I am for having discovered you. Really like your style of explaining complex problems.
Your animations about physics are some of the best anywhere. I love how you point to formulas and break them down. How long does it take you to make the animations? Do you do them yourself? Either way it is very impressive.
Thanks. I don't make them myself. I just guide the animators. This ones in this video took about a month by people who know what they are doing.
@TheZone An average atom has a radius of 0.1 nanometers. A solid 1'x1'x1' volume would have something on the order of 10^23 atoms, each with their own wave functions that would have to be nearly perfectly in-phase which each other to produce a noticeable effect from our perspective. If you had a ball of 10^23 tangled rubber bands, how difficult would it be to lay out every single one in a neat grid?
@@ArvinAsh Give my respects to the animators and the people involved in the storyboarding . They deserve an applause . 👏
WHY ARE THERE MILLIONS OF QURAN IN THE SEWERS IN MECCA IF IT IS HOLY IT IS NOT..
@@markjapan4062 According to Muhammed Abdul, (paraphrasing): there are Muslims in the East (from Egypt?), but not Islaam, whereas there is Islaam in the West but not Muslims.
Wow! This was amazing and incredibly well done 👏
The most excellent explanation I’ve ever seen on this subject. Congratulations Arvin! Keep going!
Thanks Arvin, and what excellent job you do
After another 1000 explanation clips or so I just might start to grasp this subject. It's so fascinating but so confusing. Keep up the good work Arvin!
Excellent .... take my hat off for you Arvin!!
Content like this is a blessing! Such a unique take on quantum behaviour compared to lectures!
This video should be in the top-5 videos one should start watching to get familiar with the quantum world. Thank you so much Arvin, you are doing an amazing job in educating us!
This is a great video!
Thanks!
Thanks
Wow!!! Excellent
Thank you for that explanation!🏆
Excellent presentation with utmost insight and clarity, Congratulations Arvin!
I'm a big fan of you, Arvin! You made everything complex as hell simple as a piece of cake.
ALLAH THE SUN GOD LOLOLOLOL
@@markjapan4062 ALLAH THE GAY LOLLILOLI
Excellent, the best explanation of Quantum Mechanics I have see on UA-cam!
I love when u say :" right now".👍
What a marvellously clear capture of the information related to the question asked - provides guidance (frameworks) for ongoing and greater explanation in the area. Thank you. You are tops, so very across the material.
Thanks for another great video! I love being able to understand the basics of Quantum Mechanics. Oh and great splash page. 😎
You really deserve so much more subscribers, like at least a million more!
You explained that perfectly. I totally get it.thanks so very much!!
Finally. Thank you Arvinash!
Absolutely superb demonstration ! I am sure this will encourage students (young and old) to get into the maths and physics to get a greater understanding and appreciation of quantum mechanics.
I've been waiting for years for someone to make this video.
I am already living the Quantum Mechanical lifestyle, most of the time I know neither where I am nor where I am going.
I'm 40, wish this content was available when I was 14. Great work, videos keep getting better - huge fan.
It should be noted, decoherence is often quoted as a solution to why we never see quantum behavior on macroscopic scales, but this isn't the full story. Decoherence is just a term used to describe what happens when a huge quantum system's many parts interact, both with each other and with their environment. Everything gets scrambled up, and the system's parts begin to behave according to classical probability rules instead of the Born rule. What this does model is the emergence of classical statistical mechanics.
But there is no mechanism that decoherence provides that explains the quantum measurement problem. As a system begins to interact with its environment, the state of the system, at least in principle, remains stuck is a massive entangled superposition, all the way to the macroscopic level. Interactions by themselves do nothing, according to Schrödinger's equation, to force a system to leave a superposition of states. This only appears to happen (for some reason) once the system interacts with measurement devices.
Therefore, it's still an interpretive question, and an unanswered one at that, to ask what the state of the system at large scales.
Good. Thanks.
Can it be explained as entanglement? I think this is something that Susskind is saying. The system under observation gets entangled with the particles of the measuring instrument.
@@b43xoit You may be describing one of two things with the words "entanglement" and "Susskind." One is the idea of Everette's interpretation, which is that the universe splits in some sense. Different branches of the entangled wave function describes different outcomes of a measurement. The other thing you could be referring to is the ER = EPR conjecture from Susskind and Maldacena. So, I'd ask to clarify what specifically you're referencing here.
@@jmcsquared18 I don't know about an entangled wave function having branches; that's farther along than I have studied to. My understanding is that for any given pair of particles, there is no entanglement, full entanglement, or partial entanglement, and these things can be inferred from measurements, at least partially. And when I refer to Leonard Susskind, I'm not referring to the conjecture you cite, necessarily. Just the material he states here on UA-cam.
@@b43xoit Then I suppose I'm not sure what specifically you're asking/claiming.
Absolutely fantastic. Thanks for this...I'm a Brazilian subscribed.
Great video Mr. Ash , as always. :)
Love these vids on how to simplify and make the hard topics understandable and exciting!
You are one of the first, that I know of, to show quantum weirdness at a human scale. I've been looking out for such videos. Thanks. ❤
Thank you - brilliant presentation of a fascinating subject!
Bravo! Arvin is amazing.
This is beautifully explained. Thank you.
This was a pretty good video, I'm utterly impressed
This is creative and interesting and funny. Thank you for all that work!
Excellent video, as usual!
Dude,
Seriously, you keep my retired engineer mind sharp & wanting more. Keep up the good work. God's speed.
I cannot wait until you reach one million subscribers. You deserve it 10 times over. I love your explanations so very much! Thank you very much Arvin. Don't worry it will happen very soon I hope. You are the best physics explanations on the entire you tube by far. Absolutely love you!!!❤❤❤
So nice of you
Thanks for the excellent presentation. Another analogy for the Heisenberg Uncertainty Principle I like to use is detecting audio at different frequencies. You can easily detect the start and stop of a high-pitch noise, light the "high-hat" sound in dance music. Low-frequency tones (20-30Hz) are so spread out that it's far more difficult to tell where they start in time. In typical music, a bass thud is really a short high-pitch impulse followed by the long bass note to give the listener a better sense of when the "beat" starts. Keep up the great videos!
Nice. That's a good analogy. But aren't the low frequency tones generally pressure waves? Or more correctly, sound vibrations are pressure waves. So, can we consider the Energy-time equation of the Heisenberg's Uncertainty to deduce the analogy you have given? Because I think that Position-momentum uncertainty will become vague for understanding this. What do you think?
Aaahaaa!! Loved it ❤️❤️
Fantastic..loved it dude. Quantum is a tough subject & you pulled it off.
Love listening to you. Thank you.
This is a brilliant teaching video for the layman’s introduction to this amazing field of research! Thank you for making it!
Outstanding as usual.Your videos excite me like a little child wanting to learn the mysteries of the universe.I'd love to meet you in person & discuss physics.
What a great, intuitive explanation of why we don't see quantum behavior at our macro level. How is it that after watching dozens of other videos from various creators about the quantum world, this is the first time I've understood the quantum/macro relationship?
Very nice presentation. Many thanks.
Very glad that I found this channel,really great topics👍👍
This is the first time I have understood why large objects don't act like quantum objects. I was stuck on the idea that it must be a perception problem of different scales of existence but your wave function interference cancelling each other makes sense.
Thoroughly enjoyed this video...thank you Arvin. An incoherent understanding is slightly more coherent due to it.
This was the best explanation of the double slit experiment I have ever seen - which really helps drive home quantum phenomena
Except that the double slit is not a quantum phenomenon. A quantum phenomenon either has Planck's constant in it somewhere or it requires multi-quantum correlations like entanglement. ;-)
Thanks. A clear explanation using some examples I haven't seen before.
You are wonderful in explaining and extremely knowledgeable man. Hats off !!!
As always a great upload full of insights explained in a simple and interesting way! Thnx!
What a great video!! Congrats
scuh a beatiful explanation! Thank you
Awesome explanation....
Excellent visualisation 😊
Excellent work. You always make that much awesome video and explain it very intuitively. 👏🔥
That! Is why people have difficulty understanding the Quantum World. Because we view it in terms of own perspective of life. This video serves to bridge the gap between the micro and the macro! It well pioneers a very good way of approaching Quantum Mechanics!
Re the uncertainty principle: I think that's actually one of the least "weird" properties of "quantum world". Because it's simply an inherent property of all waves, not just the wave function.
For example, you can observe a very similar thing with sound: you may have a nice tone, which is a sinusoid wave---so you can easily measure its frequency (wavelength) and that's what defines the pitch. But you can't locate a tone to a singular moment---only to an interval in time during which it sounded. On the other hand, a clap or a gunshot is easily pinned to a moment, but you can't really say what's its pitch; as it's just one sound pressure peak, there's no frequency to it... Same thing.
In the last month or so, I have seen quite a lot of videos on similar topics to this, of which three have been outstanding. Those three include this one.
You've got a new subscriber. Amazing contents!
Excellent video thank you.
Schools should show this, because its way easier to understand.
As a part-time photographer, my way of thinking about the Heisenberg Uncertainty Principle and not knowing precisely the position and momentum is thus:
If the shutter speed of a camera is thus that there is no blur at all on the per-pixel scale (Planck-length, I guess), then you can see a photo of a perfectly clear moving object, but you can't determine its speed from the photo.
If you have a slower shutter speed, the object will instead be smeared over the picture somewhat, but using the smear and the shutter speed, you can determine how fast it was moving. Even so, the image is blurred, so you can't get a completely clear look at it like you could if the shutter speed completely stopped the motion (and thus didn't allow you to determine the motion).
So with photography, you can never have perfect clarity and know the speed of the object at the same time.
By the way, I'd be happy to see Frustrated Total Internal Reflection get it own video!
I really wish educators were held to a much much higher standard (& compensated as such). Imagine a generation of people, 80+% of which being educated by people somewhere near Arvin's level.
4:24 THE ball is also interacting with the bat by which, the ball is being hit. Why ball is not passing through the bat's one side to the other?
5:15 Wave function extends till what distance? Are they extended in the entire Universe?
12:25 But light [rays or particles(may be photon) or electromagnetic wave] can go from glass this side(from where the fingerprints are visible, and because visible light can penetrate the glass, but not a human hand, might be it can go from this side(from where the fingerprints are visible) and travel till that person's hand and get reflected back to the eyes, isn't it like that?
This was insightful.
In the example where we shoot waves at the wall, and a ball comes back, it would be more accurate to show that another wave comes back, but from a specific point of the wall.
It is never “not a wave”, the collapse of the wave function is just the beginning of another wave function.
it would be a 3D localized wave, which would be like a fuzzy sphere. What we showed is pretty close imo.
Excellent..... thanks 🙏.
Thanks (again) Arvin for this video.
I always wondered why the double slit experiment doesn't work for large objects, but is does for electrons, while electrons do also interfere with their surrounding. Of course an electron is much smaller than a tennis ball, but is has a charge and mass and even the smallest interaction should prevent an object (electron) to come in superposition.
But now I understand that if an object is not a pure wave function because it exists of many waves that are not in sync, it can not be in superposition.
An electron is a single wave, and so behaves like a single wave. A grain of sand is trillions of waves that interfere with each other. It no longer behaves like a wave overall.
This episode came in the right time i was searching for superposition for weeks and quantum lifes thanks for the episode
Great job 👍
Thank you so much and beautifully done! Making the non intuitive and hard to believe awkwardness of quantum mechanics visible!!!! 👍👍👍😃
Great Video. A video on everyday life implications of Delayed Choice Experiment would be super cool.
Very well explained video! A minor factual nit-pick: you said a squash ball has almost 10^15 atoms. But 10^15 atoms of any substance is less than a microgram.
Decoherence perfectly describes my mental state 😂
Excellent explanation and video, as always, professor.
That's what I said when he mentioned frustrated total internal reflection lol
Superb presentation....
As a student of physics I was addicted to your channel, especially quantum mechanics . I have a great curiosity from longtime to know about your qualification I mean in which field of physics you studied so that you motivated to make such amazing and elaborate explanations even though professors don't gave such explanations ;if you interested pls replay...
Very will done, Arvin! I'm reminded of George Gamow's Mr Tompkins series. He did a few short illustrative stories on quantum effects if we could see them such as "Quantum Billiards" and "Quantum Jungles".
Indeed. It was an inspiration.
I have never been so excited and confused watching UA-cam video
Great! Perfect video for my doubt for why quantum mechanics doesn't apply for us. Thank you.
Thank you for finally mentioning that measurement does not mean measurement in a literal sense, this used to confuse me so much
Thank you for another fascinating video! I 💗 your channel. Thank you for mentioning the subtle point that we are all subject to the laws of quantum mechanics. The same laws of physics are universal. It's just that quantum effects are too small for us to notice at our scale.
Great video! This was one of the best. Love from Sweden💛💙
Very well presented!
Brian Greene's documentaries did this a lot and that's why I love them so much. Like in that documentary where he goes in a bar and says "I'll have what he's having", but its himself he's referring to lol
On our scale, quantum mechanics is effectively the same thing as classical Brownian motion and we can take it that the Heisenberg Uncertainty Principle is replaced by the Fuerth Uncertainty Principle on the same scale. Brownian motion can be replaced by the slightly different Lucretian motion if you like.
Such Brownian motion disrupts the Poincare cycle, so we can apply Boltzmann’s H-theorem to a gas without worrying about the objections of Loschmidt or Zermelo. There is no arrow of time issue.
This Brownian motion also causes a flow separation at the trailing edge of an aerofoil, so the macroscopic consequences of quantum mechanics can be seen at any airport.
For an electron in a potential well, the electron is described by the equations of quantum mechanics, but the well has a bit of classical Brownian motion to reflect the fact that it is a dimple in a macroscopic object. This is one starting point for exploration by computer simulation.
This has been mind blowing 👍👍
Yes.....explained simply but at a very high definition.
Arvin can you make a video on how our senses connected to the physical world ? How accurately we perceive the world?
That can be a fascinating subject, I am so sure. For example, dogs can be used to sniff molecules that no technology has to date.
That is largely unknown, but there are some very interesting areas of discovery. For example, grid cells.
Thank you Arvin, I love the way you explain very complex mechanisms in a very simple way. But I can’t fully agree in your confidence to say that certain quantum phenomena are not applicable in terms of „magic“. See, I stumbled upon your videos on my search for answers to very real phenomena I encountered and still encounter in my life. In my search I also experimented with qigong, and other spiritual or consciousness practices including breath work and visualization techniques and found out in my experience that our mind is capable of much more and we can influence matter as crazy as it sounds. It’s like muscle that just needs the proper training. What I can say is that through some practices, you start to use areas of your brain as well as body in a coherent way that will unlock certain let’s say sensitivity in your perception which will lead your conscious part of your brain or ego to be able to use and manipulate certain aspects or laws of Newtonian physics. Seeing blindfolded also through solid walls for example is taught in Indonesia as Merpati Puthi to almost the whole population. Through continuous breathwork and meditation you Rewire the visual cortex of your brain to use another information channel beyond your 5 physical senses or the signals of your eyeballs. I encourage everyone to try it out for themselves and scientifically try to find out how it works. I just can tell that it works and that the western science and physics avoid to dive into the topic which is ridiculous. Interesting fact, children learn this ability in a matter of minutes, since they don’t have learned barriers in their mind or trained worldview. My 7 year old son was able to see completely blindfolded right after I told him to look for the “information” in his mind. And before commenting this, just use UA-cam and research a little or even better if you live near Utah go to MP USA or watch their videos and the reviews of their students. Thank you Arvin again for your informative videos, I love them! Would love to see a video from you trying to explain just the ability of seeing blindfolded after you learned some of those methods from MP USA. Looking forward for that! 😊
cool. we have a lot still to learn :)
U nailed it❤️👍
Macroscopic quantum mechanics can explains Paranormal things
For example: somatic quantum entanglement explains things like telepathy, observer effect can explains whatever people calls "artistic licenses", and so on
Hmm… in the illustrated example of the aircraft seat, the new passenger only seems to determine whether the first seat is occupied.
Surely, there is now still uncertainty about the three remaining seats and their occupancy should still be superposed?
Arvin, what a didactically amazing idea!!! I've never seen anything like this before, and such an animation is immensely instructive for looking at the unintuitive wave properties! A tiny nitpick, at 5:50, about the uncertainty principle (UP), it would have been better to say more unambiguously that the UP had been _estimated_ by Heisenberg and _derived_ a few years later; it's simply the Schwarz inequality between conjugate uncertainties in the position and momentum spaces, related by FT-but you know it, whom I'm talking to! I personally know that many physics enthusiasts who try to wrap their heads around QM believe the inequality has been _postulated_ axiomatically, like, for example, the Born rule has. Possibly, the persistent imprecise wording is due to the fact that Heisenberg didn't derive the formula later named after him, as the Stigler's law (formulated and named after Stigler by Merton, naturally) predicts. He only used an order of mag estimation.
Too bad we use imprecise “principle,” “rule,” “postulate” etc. in physics. QM is sheer math, with its complex-valued operators and infinite-dimensional state spaces corresponding to nothing in Nature, that, IMO, it would be less confusing-assuming generously that QM _could be_ less confusing-to use “theorems” and “axioms,” as mathematicians do. “Heisenberg's theorem,” “Born's axiom;” no ambiguity :)
Owning a 5-string bass guitar with an added low B2 string (~125 Hz), I often use it as an example: if the player slides his finger up or down a semitone, changing the length and thus resonant frequency on this slow-vibrating string, how much time does one need to recover a new note-i.e, the change in frequency? The answer is derived (with a few technical assumptions) with FT and the same bounding inequality on the time and frequency domain uncertainties: exactly 1/4 of the period. It's a warm-up math before the full UP derivation. :)
If Plank's constant (h = 6.626 x 10^-34) was larger, we would see Quantum effects in macro-scale objects.