The quantum spin of fundamental particles such as electrons is profoundly different from the concept of spin in classical physics. In classical physics, the spin of an object can be described by an arrow pointing along the axis of rotation. The length of the arrow indicates the rate at which the object is spinning. An arrow pointed in the opposite direction indicates that the object is spinning in the opposite direction. If we change the axis of rotation, the arrow changes accordingly. At any given moment in time, this arrow can be thought of as the combination of three arrows pointed in each of the three dimensions. We refer to these three arrows as the “component of spin in the X direction”, … …the “component of spin in the Y direction”, …and the “component of spin in the Z direction.” In classical physics, it is possible to know the values of all three arrows simultaneously. And in classical physics, these arrows can have any length. If the spin of the particle is aligned in the Z direction, then in classical physics, the X and Y components of spin would be measured to be zero. But, in quantum physics, we never measure zero for the components of an electron’s spin in the X, Y, or Z direction, nor in any other direction. It is therefore not possible to accurately represent spin in quantum mechanics with an arrow pointing along an axis of rotation, as is shown here for the case of classical physics. This does not accurately describe an electron’s quantum spin, as this picture falsely implies that the X and Y components of spin are zero, which is never the case. For an electron, we are only able to measure one of these three components of spin at a time, and there is only one possible length that all three arrows can ever be observed to have. For example, the arrow representing the Z component of an electron’s spin is always observed as either being pointed up or pointed down, but the length of this arrow never changes. Suppose we measure an electron’s component of spin in the Z direction. If the only other measurements we make on this electron are other measurements of spin in the Z direction, then we will always obtain the same outcome as in our original measurement. But, the moment we measure the electron’s component of spin in one of the other two directions, we lose all knowledge of its spin in the Z direction. After we again measure the electron’s spin in the Z direction, there is a 50% probability that it will be in the opposite direction than it was before. If we know the electron’s spin in one direction, then the electron’s spins in the other two directions are in inherently unknowable indeterminate conditions. If this electron is entangled with another particle somewhere else in the universe, then it is possible to have a quantum state in which the electron’s spin is inherently unknowable in all directions simultaneously, including directions unaligned with any of these three axes. But, if the system consists of just this one electron and nothing else, there will always be exactly one direction in which it is possible to know the spin with certainty, though this direction might or might not be aligned with one of these three axes. Let’s focus on systems involving only a single electron, and let’s have the yellow arrow represent the one direction in which it is possible to know the spin with 100% certainty. The probabilities of measuring the electron’s spin in all possible directions, including directions not necessarily aligned with one of these three axes, is determined by what we call the quantum spin state of the electron. The electron’s quantum spin state is described mathematically by two numbers. These can be complex numbers with imaginary components, but let’s initially just consider cases where the imaginary components of both numbers are zero. The real components of these two numbers are represented by the two coordinates of this green arrow. The red sphere represents the first number, and the blue sphere represents the second number. If the first number is “one” and the second number is “zero”, then this indicates that we know with 100% certainty that the Z component of spin is pointed up. On the other hand, if the first number is “zero” and the second number is “one”, then this indicates that we know with 100% certainty that the Z component of spin is pointed down. This combination of numbers indicates that we know with 100% certainty that the X component of spin is pointed in the negative direction. This combination of numbers indicates that we know with 100% certainty that the X component of spin is pointed in the positive direction. Let us add this new axis to represent the imaginary component of the second number. This combination of numbers indicates that we know with 100% certainty that the Y component of spin is pointed in the positive direction. This combination of numbers indicates that we know with 100% certainty that the Y component of spin is pointed in the negative direction. The green arrow can be pointed in any direction, so long as it has a length of 1. When the electron is not interacting with anything, and we are not making any measurements, the green arrow representing the quantum spin state will never change directions. But, the moment we make an observation of one of the components of spin, the direction of the green arrow will change to one of the quantum states where that particular component of spin is known with 100% certainty. Let us again focus on all the cases where the imaginary components of both numbers are zero. The probability that the Z component of spin will be measured to be pointed up is given by the square of the length of this red line. The probability that the Z component of spin will be measured pointed down is given by the square of the length of this blue line. In this condition, the square of the length of the red line is 1, and the square of the length of the blue line is zero, indicating a 100% probability that the Z component of spin is pointed up, and a 0% probability that it is pointed down. In this condition, with the Z component of spin known with certainty, the squares of the lengths of the orange and purple lines are both equal to one half, indicating that there is a 50% probability that the X component of spin is in the positive or negative direction. The probability that the X component of spin will be measured in the positive X direction is given by the square of the length of this orange line. And the probability that it will be measured in the negative X direction is given by the square of the length of this purple line. In this condition, the square of the length of the orange line is 1, and the square of the length of the purple line is 0, indicating that we know with 100% certainty that the X component of spin is in the positive X direction. But, the squares of the lengths of the red and blue lines are now both equal to one half, indicating a 50% probability that the Z component of spin is pointed up or down. Let us again add the axis representing the imaginary component of the second number. Although the first number can also have an imaginary component, we will just show examples where the imaginary component of the first number is zero, due to the fact that this animation is limited to showing only three spatial dimensions. The squares of the lengths of the red and blue lines will continue to indicate the probabilities of measuring the Z component of spin as before. If the green arrow is in this position, then we have a 100% probability that the Y component of spin will be measured in the positive Y direction. With the green arrow in this orientation, we know the Y component of the spin with 100% certainty, but the squares of the red and blue lines indicate that there is a 50% probability of the Z component of spin being in the positive Z or negative Z direction. The more certain we are about the spin of the electron in any one of the three dimensions, the less certain we are about its spin in the other two dimensions. When the electron is not interacting with anything, and we are not making any measurements, the green arrow representing the quantum spin state will never change directions. But, the moment we make an observation of one of the components of spin, the direction of the green arrow will change to one of the quantum states where that particular component of spin is known with 100% certainty. For any given quantum state, we can calculate the probability for the measurements of spin in all three dimensions through the following procedure. Every possible quantum spin state for an electron can be written mathematically as follows. The “C” variables are constants that can have complex values, with real components and imaginary components. We can calculate the probabilities of measuring the Z component of spin through the following equations. Every possible quantum spin state can also instead be written as follows. As before, the “C” variables are constants that can have complex values. We can calculate the probabilities of measuring the X component of spin through the following equations. Every possible quantum spin state can also instead be written as follows. As before, the “C” variables are constants that can have complex values. We can calculate the probabilities of measuring the Y component of spin through the following equations. Each of the three different ways shown of writing the quantum state comes from the fact that the spin in each of the three dimensions has a matrix associated with it. Each matrix has two eigenvectors. Each of these eigenvectors represents one of the quantum states we have been discussing in this video, where the spin in one direction is known with 100% certainty. Suppose we want to measure the spin of an electron in a direction that is not aligned with the X, Y, or Z axis, and that we describe this direction with an arrow of length one, which we call a “unit vector.” The matrix associated with the spin in this direction is a linear combination of the three matrixes shown previously, in the exact same proportions as the unit vector describing this direction is a linear combination of unit vectors pointed in the X, Y, and Z directions. The spin in the direction associated with this new matrix is known with 100% certainty when the quantum state is in one of the eigenvectors for this matrix. The value of the measured spin in this direction is the eigenvalue associated with this eigenvector. For a system consisting of just a single electron, every possible quantum spin state corresponds to knowing the spin in some particular direction with 100% certainty. Though, if we have a system with two electrons that are entangled with one another, then it is possible to have a quantum state in which the spins are completely unknown in all direction. Much more information is available in the videos titled “Quantum Entanglement”, “Quantum Wave Function Visualization”, “Quantum Operators”, “Schrodinger’s Equation”, and in the other videos on this channel. Please subscribe for notifications when new videos are ready.

It simply makes no sense. Scientists try to ignore that it doesn't make sense and claiming it's still true. It's a silly thing to do. Like walking a full circle along the circumference of earth, yet still claiming it is flat.

The light of speed is not the maximum speed. Photons have mass, thus not zero rest mass, thus do not travel at the maximum speed when emitted. Electrons have not been proven to be particles nor have they been proven to be waves. We don't even know what an electron is. We don't even know what 'spin' is. For all we know electrons can be infinite in size, but have a single or a few focus points. We can think of thousands of silly things electrons can be or what properties they may or may not have. Perhaps it's better to try and find out instead of claiming they have a different set of rules.

When you really become honest, we don't even know whether knowledge exists. If it does exist, we do not know if we can obtain knowledge. We do not know how to obtain knowledge. We do not know how to know that we know. And how would we know that? We are playing silly linguistic games trying to describe reality through our narrow perspective and claiming it's 'true' what we believe to be true. Everything you see, hear, feel or think is a simulation within your own brain. There is nothing any of our kind is capable of observing, solely simulating and trying to interpret. You never have seen anything but an interpretation, a simulation if you will, of neural signals send by your eyes to your brain and processed. You have but seen what your brain visualizes.

We are nothing but dust and to dust we shall return. That is unless we try to focus on how to actually know something is true. We did not eat of the tree of knowledge. We are not 'knowing' creatures. We are animals pretending to be knowledgable. Perhaps it's time to be honest and say we do not know. We do not even know if we do not know. Perhaps we know perhaps we do not know. We believe though, atleast we think we do. Or atleast we experience that we think. Or do we not? It is time to re-think what truth and reality is, time to be more humble. Time to admit we are not enlighted, yet hope to still one day be.

I am pretty on an idea that 85% on diag.spin vs x and y spin lies in the fact that the two particles can't be measured at the same moment so the particle measured first while rotating the axis towards the plate creates a temporary field that moves the axis of the particle measured later towards the plate by an amount that causes the percentage to increase by 10% from 75% to 85%……….

Quantum marasmus!

never thought i'd hear leah remini narrate quantum physics!

just great

It would be interesting to see a version of this animation with Larmor Precession.

Came away from this video more confused than when I started. For example, at 8:17, the red sphere is clearly hovering above 0.7, yet the number represented on screen is 1 over the square root of 2! How or why this is supposed to make sense is never explained.

All particles are entangled what we measure here is what causes the alternate outcome in other worlds …..lol I was just thinking what if this is a real thing 👀

Absolutely brilliant explanation!

Mathematically it is all very good. But what does quantum spin physically mean? What is the meaning of electron having a spin of 1/2 and Photon having a spin of 1? What does it mean physically?

wow .. like a quantum love poem ..

Espetacular!

Could this represent the future unfolding at any given moment in time as an interactive process?

1:08 ZED!

but it's not necessary to consider the case when both of nubmers have non-zero imaginary part! Only the phase difference matters. That's because wave function can be multiplied by any number with modulo 1 without changing the state!

For example:

[i/sqrt(2) 1/sqrt(2)] = i [1/sqrt(2) -i/sqrt(2)]

[1/2 + i/2, 1/2 – i/2] = (1/2 + i/2) [1, i] = (1/sqrt(2) + i/sqrt(2)) [1/sqrt(2), i/sqrt(2)]

[ae^iφ, be^iθ] = e^ιφ*[a, be^(iθ-iφ)] (where a^2 + b^2 = 1 and a,b >=0)

Thank you that enriched my phy exp

I don't need to understand this, I have Jesus.

Look at the new consequences of Bohmian quantum mechanics at

https://www.researchgate.net/publication/320107963_On_Bohmian_quantum_mechanics

Your visualisation are genius 🔴🔵👍🏽😉 xxxxx

I need to get better at calculation 😉👍🏽

It seems the most obvious & logical explanation for a #particle acting like a #wave when moving thru space is that it's orbiting something (a dark matter particle perhaps) or visa versa.

It's not unlike Earth being pulled into a wobble by the moon, or a distant star's wobble evidencing planet orbits making our trajectory as we fly thru space have an axial wave (packet) as well.

And since we think we know undetectable dark matter exists but don't yet know where it's distributed, this seems the most logical possibility. What do you think?

This could explain the double slit experiment results, including with a detector with some interaction between the dark matter and the detector, it could explain the Heisenberg Uncertainty Principle, as well as explain the deflection of the axis of the particle's wave motion moving thru polarizing filters rotated less than 45 degrees apart.

Perhaps the only reason for photons' max speed limit is the dark matter they're paired with.

This could also explain why the universe is expanding from the central Singularity point of the Big Bang outward in all directions faster than the speed of light into previously completely empty universe space, given that there is no Dark Matter there yet.

I believe that a photon-dark matter particle pair will not necessarily move thru space as an apparent helical coil "wave packet" because the rotation of the pair (the apparent wave function) can also be polarized into axial waves as we know.

The question is could it be presented better? I doubt so….

Definitely the best visuals I've ever seen for a science video on youtube. Still don't fully understand the concept but pretty sure thats just cause this concept, like most quantum mechanical concepts, is abstract af.

Thank u

needs owls and cats😐

are you a fan of classical music?

best explanation by far of spin

Wonderful…. especially the way the imaginary axes are explained is amazing… Nice imagination to understand quantum physics… Plz do cover other aspects of science too…:)

You should kills the background muzak. It's very distracting.

This video is so usefull to visualize quantum-mechanical spin! Please do not stop making videos and really thank you for your help! 🙂

Why -i / √2 if i = √2 why not just say -1

As a lay person amateur scientist what we are observing is free fall matter i.e. the electron with spin.

without a fixed reference point we are unable to determine the true components of the spin hence when the measurement is against another electron it forces a pseudo reference point which allows you to measure spin relative to the other however without a fixed reference point we are unable to determine the true essence of the spin trajectory.

My observations of the universe is that all matter is in free fall with some initial spin trajectory at conception

If the matter is made up of only 4% in the Universe and the rest 96% is made up of dark energy and dark matter i.e, matter must be surrounded by sea of dark energy and dark matter, then how come the electrons could communicate with each other in any part of the universe ?

17:19 How on earth can we possibly know that it never changes directions since we are not measuring it??

who would win?

the whole concept of spin in classical physics vs one tiny watermelon boi

Your visualisations are masterful!

I liked this, but I'm still scratching my head…

so what device to measure the exial ?

This is great but I still cannot get my head around why complex numbers were required and a simple 3D vectorspace of real numbers was not used when this was invented. Still fairly new at this…

Looks to me like the tools used in making the observations are interfearing and probably the reason why the spin changes.

A new form of observation needs to be figured out

Thank you!!!

So in other words life is 50 /50 if you look for something then you change the other things your not looking for and once you find what you see its 100% that what you see it there. but what your not watching could be different. I learned that when i was 4 mo old.

This is probably a dumb question could you inject a measuring device into an electron and then shoot it threw the double split experiment?

Amazing visualizations, helped me a lot!

The music is just so annoying when you try to understand something. Can you put it off?

Well, that’s that explained then 🤦🏼♂️

what's the first melody ?

I do not get it.

I m nt enough capable to understand.😪😪

Doesn't sound like a Eugene ?

Very very easy explanation of the quantum spin. Thanks for making this video.

Thanks for another great video. At 6:15 you say 'let's have the yellow arrow represent the one direction in which it is possible to know the spin with 100% certainty'. It looks like the yellow arrow is pointing along the Z axis. However per earlier description the spin can never point along one of the three axes, in other words quantum spin can never be in the z or y or x direction exclusively with zero component in the remaining direction. Is that correct? If so then is the yellow arrow in your picture is actually not pointing in the z direction – i'ts pointing perhaps a little angle off but definitely not pointing exactly in the z direction.

not bad

Electrons do not spin it's impossible they may be able to shift to repel but spin is not possible. If you flipped an electron upside down it would then be spinning the opposite way which would prove this wrong instantly that they all spin the same way or imply that there is a top and bottom with no explanation on why or cause to point at why.this is a perspective issue which tells me there is a missing piece.

So a wave have spin???

The limitations of mathematical definition are as much responsible for our inability to truly reconcile classical and quantum states just as much as the definitions of mathematical limitation have increased our understanding of both models. It is apparent the limiting factor is really an erroneous mathematical representation of the true states of energetic wave/particle duality under gravitation influence, as evidenced by repeated concomitant observation.

Quantum dimensional electron (i.e. all mass-energy) spin states should be represented logarithmically thus ensuring observational changes of electron charge, angular momentum and spin state not demand Schrödinger's feline ruin it all by collapsing the wave function.

Does anyone have a asprin ?

In Spanish please Eugene, for next videos.

Excellent, congratulations for your work

Help

I didn't get the matrix part

So when we talk of a particle spin what is the basis of the X,Y &Z axis. What is the frame of reference?

The earths “Spin” can be defined it terms of the North Pole, North Magnetic Pole or it’s orientation with respect to the sun.

The Spin can change by. 1: The Magnetic Poles Flipping. 2:The Planet flipping upside down. or 3.The planet stopping and changing the direction it is turning.

Also at 0 :32 you state “in classical physics” “an arrow pointed in the opposite direction indicates the object is spinning in the opposite direction” . This is a non sequitur. What is the frame of reference? Does the spin direction change with respect to the direction of Magnetic moment? With respect to the real world orientation of the measuring equipment? With respect to an external Electric or magnetic field?

This is not about the definition of “Spin” it’s about what variables are being looked at to determine spin.

Good video.

very beautifull

fantastic, wonderful, so is the reality! gracias!

I didn't catch why does the length of spin is equal to 1. Could you explain?

…so the enigma of quantum mechanics.get to the end…thanks to this videos..uuhhum….

very nice…good video.

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Thanks.

My head is spinning.

17:18How do we knowthat the Electron's Spin State"…will never change directions"if"…the Electron is not interacting with anything andI mean, it seems to me like the whole "Is the Moon really there if we aren't looking at it?" scenario. Like the Electron could form an endless possibility'of potential Spin when we aren't looking, or the wave function / probability amplitude would be endless (or at least within it's known, measured perimeters) whenwe are not making any measurements"?notbeing measured. In other words, when wearen'tmeasuring an electron to find it's properties, could it potentially be in a state that leaves openeverypossibility, and we only find it's 'current' Spin State once we actually do the measurement.BTW…for those who've read this far, please understand I'mnottrained in Physics (hence my arrival at this video should prove) and have only made my best attempt at asking this question. So feel free to answer freely,withoutbeing an ass about it and belittling me for my lack of knowledge on the subject (yeah, that'd be nice), even if you have a PHD, which I'm assuming youbecause you're here too.don't-Cheers!!!

EDIT= If you're going to point to17:33as an answer …it doesnotseem to address my question because all it says to me is that 'measurementimposesthe Spin state on the Electron' depending on the device used. Spin is Up or Down if the devicemeasuresup or down, and it's Clockwise or Counterclockwise if the devicemeasuresclockwise and counter-clockwise. That doesn't answer why we think we know what the Electron is doing when we arenotmeasuring it. Howcouldwe knowwhat the Electron is doing if we can't measure it …when we aren't measuring it?Now I'll answer the critique I

receive after asking clear and detailed questions:alwaysYes, I've written a lot. I don't care, and I don't care what you think about that. And yes, I do have a lot of time on my hands (…apparently

you do tooif you've readthis farafter trolling through other comments to read mine). I like the English language and am not ashamed to use it …unlike all the tide-pod eaters out there who think one is notsupposedto write a lot (which regretfully, will likely leave the future of Poets in a massive decline). And no, Idon'thave anything better to do, and again donotcare what you think about it. Now, blame me for being jaded, because people I've never met,alwaystry to make me feel like s**t for asking clear and detailed questions, then blame me for expecting them to treat me like s**t.TBH, I'm physically disabled, having a painful day, and looking for a distraction (which these videos

and writingprovide).Isn't this just so much fun?

Grab a globe of the Earth and give it a spin in the direction the earth spins; Using the right hand rule, your thumb points to the Arctic, and you see the East Coast turn into view before the West Coast. While still spinning; flip the globe upside down, using the right hand rule your thumb is still pointing to the Arctic and the East Coast still appears before the West Coast even though your thumb points down. I have been told this is SPIN UP.

Now I spin my globe in the opposite direction…Right Hand Rule, my thumb points to the Antarctic, I see the West Coast before I see the East Coast, no matter how I orientate the globe . This is truly a change in Spin Directions, and I assume this is the Equivalent of SPIN DOWN.

Here is the problem: Notice your “Globe” never changes Spin Direction, the large asymmetrical black smudge on one side of your globe is always becomes visible “smoother side first” . It is always Spin UP.

Such an obvious mistake? that makes everything so confusing. WHY?

The best series of educational videos I have ever seen in youtube! Excellent!

I love this watermelon

Is there a video that shows what spin quantum numbers mean? Like, what is spin 1/2? What is spin 2? What is spin 1?

@4:30 indeed… compare the spin of an electron with a compass, those to measure Earth's magnetic field direction

for the compass, you just "look" at its needle and you see its direction, but for the electron spin?

its' quite like with indetermination principle: if you want to know where a car is and where it's going, shining light on it won't make it change position or speed: in classical mechanics a "measurement" is an "interaction" which affects the measured object minimally (check what happens when you measure temperature of something), in QM it's not like that…

similarly, to measure the "spin along one direction" is an "interaction" which heavily affects the electron: whatever spin it had before the measurement, it will be along that direction, while the "orientation" along that direction is told by a photon being emitted by the electron or not…

it's like if, to measure where a compass is pointing, we turn Earth upside down to our favorite spatial direction and then look if the needle is along that direction or the other way…

still call this a "measurement"?

it's more like tossing a coin…

set to double Speed. this is way too slow

The soundtrack please, it's so calming

As in the Double Slit Experiment i have to presume that the act of measuring anything like the position of an electron or the spin of an electron changes the condition of the propertie of the electron. By measuring the property, we force the electron to assume a condition. The fact that we measure the condition Spin Up the first time and Spin Down later on (after measuring it in a different direction) kinda proofs that we alter the property (read: force it to assume one of the possible conditions that we propose)…. Although that's how far my understanding goes at this given point. Feel free to point out mistakes in my train of thought!

If the spin changes because of how it is measured, you have corrupted the experiment and the data is worthless. What other properties do you measure? Does this measurement affect that too?

Why cant it be along an axis?

What is the significance of this axis? We could just accept x as horizontal (relative to up and down, which is a bs reference)

And please tell me how to single out an electron and how to be sure i have successfully completed the singling out of an electron, im dying to hear.

Your maths indicates a 100% certainty, but is that what is happening in reality? What if the measurement was taken by an apparatus that itself is spinning? Is that spin taken into account? These are only relative values with no true reference point… ok for relative data. Absolutely USELESS for stating a true value.

Is this what experts believe to be credible data? If so, that makes that expert a knowledgeable idiot.

By just existing the electron is interacting with something.

This is annoying. Im out

Use the Spin Johnny!!

I'm just commenting to give the youtube algorithm something to bite on when the person is looking for electron movement and its visualization in a 3D – Enviroment.

love the vid keep it up

what equipmet or method was used to measure electron spin in different directions?

this channel made me realise physics actually exists outside my texbook and the dumb scribbles on the white board

Arigato Gyro

Too slow!

I feel really really lucky to came by this channel.the way you visualized this…is just great!

sounds like with 100% certainty no one knows this shit.

But what does it mean spin. What happens if you set it to zero somehow. I do not think we know what spin is good for. It looks like spin is a component in a theoretical model of matter which is inadequate like the model of concentric geometrical figures Kepler had to represent the guiding principles of movement of planets a model Kepler abandoned when he was given Ticho Brahe observation notes made during 30 years of looking at the sky.

amazing !!!!! thank you for this

После того, как я в школе в первый раз услышал "Спин – это как вращение, только это ВОВСЕ НЕ ВРАЩЕНИЕ" – я сразу понял, что это риальне ЕБОНУТАЯ наука. Но я до сих пор люблю физику, особенно физику элементарных частиц и астрофизику. Таки дела

I'm really confused. What are the blue and orange arrows in 7:03? The axes are not labeled. I have no prior knowledge of any of these symbols (psy represents spin? why two numbers??? what is the green arrow??? why imaginary numbers????? is this explaining things in multiple dimensions???). If these things are not explained in more detail I have a really hard time following. The video is really slow, but it doesn't explain everything that it's showing. And I really wish it did.

Update: are they just trying to represent 3 dimensions with 2 numbers, and hence the imaginary numbers? Why not then have 3 numbers in the first place??? And why not say beforehand, let's use 2 numbers to represent x,y,z dimensions, but since we only have 2 numbers, we're gonna use imaginary numbers.

Update 2: okay. I was wrong. Why are the Y coordinate only has 50% certainty and Z and X coordinate has 100% certainty???? This is so very confusing! And why does the electron do that, I mean, change its spin?

Update 3: watched the whole video and I'm still thoroughly confused. Every 5 seconds I find my self asking, why? why are we doing it this way? why is the green arrow that "represents real numbers" then goes into the imaginary coordinates? Why? Why? Why? I can't figure out what's arbitrarily chosen to be representations of a simple thing or a simplification of a really complex thing. I feel like I need someone to sit with me and in plain conversational English explain everything step by step, every symbol, every turn, every number, every arrow, every action in this video and what's going on and why. None of this video made any sense to me whatsoever. And I'm left with a thousand more questions than when I started. And I need to know the whys. Please someone explain. I feel like I need to watch at least 10 other youtube videos before getting what's going on in this one.

Bsckground music too loud.

Feynman of our generation

This doesn't explain what quantum spin is, rather what happens when you try to interact with it by measuring it. Just because you shine a laser through a narrow slit and the Heisenberg uncertainty principle causes it to visibly fan out, that doesn't explain what it is and why it happens.

Completely confusing.

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ı didnt get 5:58 part , what is exactly the direction other than these three axes

The best explanation ever. Thanks

Which music use in background

incredible videos man, the visualisations and slow paced explanations really help in understanding these abstract concepts