Lecture 1 | New Revolutions in Particle Physics: Basic Concepts
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- čas přidán 28. 08. 2024
- (October 12, 2009) Leonard Susskind gives the first lecture of a three-quarter sequence of courses that will explore the new revolutions in particle physics. In this lecture he explores light, particles and quantum field theory.
Leonard Susskind, Felix Bloch Professor of Physics, received a PhD from Cornell University and has taught at Stanford since 1979. He has won both the Pregel Award from the New York Academy of Science and the J.J. Sakurai Prize in theoretical particle physics. He is also a member of the National Academy of Sciences.
Stanford University:
www.stanford.edu/
Stanford Continuing Studies Program
csp.stanford.edu/
Stanford University Channel on CZcams:
/ stanford
I can only repeat what so many commenters have already said: Thank you Stanford for hosting these free lectures, and thank you, Prof. Susskind for preparing and presenting these lectures. Stanford and Prof. Susskind are gifts to the world.
I feel so pampered and spoiled being able to sit in bed with my jammies on watching this lecture on particle physics. It can't get better than that!
Lmao 8 years later, everyone is like this due to Covid. You my guy predicted the future
,yes...and a cup of coffee and why 2 🥧pie!
Standford is so generous to put these online for free, and Professor Susskind is such a fantastic lecturer.
you know the world is becoming a better place when education is essentially free. thank you Stanford!
So many professors ban all recording devices from their lectures. Mr. Susskind is a saint. He hands out gold freely like it's nothing to him. What a man.
I have never seen a professor who did that.
I don't think this has been said enough, thank you Standford for these free lectures. Thank you!
I'll tell you what I like about Lenny: he keeps it as simple as it can possibly be kept. For him there's none of that deliberatey jargon-drenching, I'm-smarter-than-you crap that marks out the lesser mind. He loves the subject. He keeps it simple because he has to think about it and, in that, simplicity is always going to be his friend. He really likes to tell people about what he's been thinking about, and he can spot a fool at fifty paces. Great shows, Maestro.
I saw this attitude represented by a few of the students in the video as well. Made me chuckle. This is only their first lecture- their questions were valid but their approach were filled with hubris of the ignorance. The wise man knows he is a fool
This man is ridiculous, I love everything about him. Not only does he have amazing intelligence and a very simple way of portraying his ideas, but he is funny and honest and-- And damnit, the man fought Hawking and won, in a ways. He's one of this centuries great theoretical physicists. Just wanted to give my 2 cents.
May I ask you guys something?
So, I don’t know much about physics, but I’m planning a WEBTOON and I wanna make it about these two people...one is able to create energy and another one destroys it
I KNOW YOU CANNOT MAKE ENERGY OR DESTROY IT, OK, BUT IT’S FICTION
So...I figured the person who destroyed energy could make things levitate (destroying the force of gravity) and freeze things (destroy kinetic energy), but Idk what other powers I could come up with
And I have no idea what energy creation could bring, I suppose you could make things move to your wish by creating force on them and you could melt stuff but Idk
And what could they do together???
@@annymus4502 creating energy may lead to a power of move anything from anywhere, increasing kinetic energy and having ability to emit radiations of any wavelength, as wavelengths are just energy
@@akhandanand_tripathi
Ok, thanks
@@annymus4502 o
@@annymus4502 it's interesting that wisdom as old as Moses places the "Proton" at the center of 3 shells. The Proton is a king and his throne is called "The mercy seat." The shells are called "courts." Outside the courts is darkness and the evil one who hates, destroys and kills. The Proton is merciful, good and loving. He "draws" people into the outer court with "cords of love." No real cords but the magnetic power of love. The people of the enemy don't understand. The are rebellious like the evil leader and rage in anger wanting to cut the cords or "cast them from us." Each person has 3 main parts (like quarks.) In each court he gets more oil for his lamp and grows brighter as he approaches the Proton. The evil one uses deception (like fake news) and outright lies to call the man back to him. If he can get the man to "doubt" the truth, the man fall back and loses some light and power. It's very interesting that the old literature names each man in the courts an "electon." The evil one wants to steal the man's oil. In the first court his first quark is "quickened"--he is enabled to love his family and the desires of his heart turn toward good. (This increases as he moves forward until he can love even his enemies. The evil one tries to cause disruption--like maybe he entices the man's wife to cheat on him. He lays "snares and traps." There's a lot more. The pathway of the electon through the shells is called "the way of life." The second quark is about the man's ability to work--whether it's military or any kind of labor inside this kingdom. The third quark is the quickening of the mind. After those 3 (trimesters) there are mystical abilities. There are an octave of steps and with the 8th he returns to the outer shell where he teaches and serves the beginners. Iron can't hold him. And he can move from place to place quickly without being seen. He hears the lightning speak and he can hear/see into other dimensions. He can heal.
Susskind: Speed of light is very large and Planck's constant is very small
Also Susskind: Let's set c=h bar=1
I like the part where he teaches particle physics to the entire world for free.
@@AndreCabannes thank you !
@@AndreCabannes omgosh thank you
@@AndreCabannes thanx buddy
@@AndreCabannes please nuclear physics
Andre, Big THANKS.
One of the living legends. Everytime I fallow his Lectures, I learn the thing so easily and it motivates me time to time...
Pretty incredible what the internet can do for those seeking a world class education.
And its sad how this still has less than 400k views over 8 years later.
Susskind has so many lectures online. Thanks Leonard!
Maybe, but this isn't it. 2 hours to give 2 constants and babble... too bad. At least some other videos are more interesting
Many try but no one knows particle physics like Susskind
Try ttt
I have degrees in chemistry and physics. I jokingly looked this topic up and found professors that collated a significant amount of knowledge processed through a research project I developed. WTF is CZcams!? The availability of knowledge is mind boggling to me, as well as inspiring. Knowledge shouldn't be limited to a person or family with more funds than another; knowledge, especially scientific in nature should be free for any person to enjoy.
May I ask you guys something?
So, I don’t know much about physics, but I’m planning a WEBTOON and I wanna make it about these two people...one is able to create energy and another one destroys it
I KNOW YOU CANNOT MAKE ENERGY OR DESTROY IT, OK, BUT IT’S FICTION
So...I figured the person who destroyed energy could make things levitate (destroying the force of gravity) and freeze things (destroy kinetic energy), but Idk what other powers I could come up with
And I have no idea what energy creation could bring, I suppose you could make things move to your wish by creating force on them and you could melt stuff but Idk
And what could they do together???
Intro and history of radioactivity; Quantum mechanics 41:30; relativity 56:00; dimensions and units 1:05:05; momentum 1:33:00;
I love how Susskind eats during the lecture and talks with his mouth full lol. If it were anyone else it might be annoying but with Susskind it's just endearing.
Susskind is a brilliant scientist as well as a brilliant teacher.
I would like to add my thanks to Stanford for posting these lectures. I am in Chicago, and although we have colleges and universities here, it would have been very difficult for me to fit refresher physics courses into my schedule. Thank you for delivering physics to the masses. Thanks Professor Susskind.
His lectures are so freaking dense. 40 minutes in and I need to start looking things up before I can continue listening without confusion. His advice to visit his content on CZcams is wise.
Thank you to everyone involved in creating and sharing this!
I gotta say, I appreciate Dr. Susskind for contributing to this open source but also to Stanford for providing an entire library of near-complete course lectures.
Very great Professor indeed... I started watching His lecture videos way before i began my undergrad studies ,,,, and all the time He is my go to guy if i come across something i do not understand. Thank You Prof ,,,, Your work is really helping the whole world
Leonard Susskind: One of the greatest physicist and physics teacher from our time, in the same LEAGUE as Feynman and other legends...😀
Prof. Susskind lectures have to be elected for humanity world heritage
His grandmother was probably born around 1890.
Thanks a lot , Master !
Love these lectures!
(Speed of light is 299792458 m/s not 299762458 m/s.)
So far i am working through all the lectures and they are all very well done. I think it is deserved that I show my appreciation to put this out there for us interested people to watch and learn from.
Thanks alot Stanford, for me this shows you really take educating people as the core of what you are doing.
Thanks so much. You've taught me so much at the young age of 14 I can hold conversations about science (most of the time I lose them in it) with people on the CMU and Pitt campuses on school field trips. All thanks to you Mr. Susskind!
Keep it up!
the educated minds are drastically reducing in populous, I implore you to advance your mind. It's a beautiful thing to understand concepts and think beyond a conditioned realm. Intellect where used responsibly can launch our civilization at light speeds into the future.
Same Here My Friend. But My Thanks Is To The Whole Internet Of Things.
At Age 13 I Know Many Things.
Forgive me if I sound rude in saying this but, it's very presumptuous to claim you lose others in conversation about rudimentary particle(atomic) physics lecture matters. More so, that your confidence about the nature of the topic in general is validated by your so claimed superiority in the nature of the subject. There are a lot of beautiful mathematics that is involved in understanding the subtle intricacies of what modern scientists know today. Intuition, logic, critical thinking, and more importantly the desire to understand the process is what is important. This process takes time.
Lol. Good teacher. Great sense of humor and he doesn't take himself too seriously. Always an advantage in a discipline where egos can become so inflated.
Thank you very much Leonard Susskind and the University of Stanford! I am doing my final paper, for my pre- University education in Holland, about Bose-Einstein condensation and these lectures help a lot!!!!
Classical Mechanics - Statistical Mechanics - Special/General Relativity - Quantum Entanglement/Mechanics - Revolutions in Particle Physics - String/M-Theory....roughly. Enjoy! They are all amazing. And if you want more afterwards look up Balakrishnan's Classical Physics/Quantum Physics lectures...they are incredible and much more in depth.
Simply amazing. The edge of human knowledge been taught for free during 1 hour and a half. :)
Thank you Standford.
@TirianB writing 2.99762458x10^8 instead of just 299762458 will help us know that the number has 9 digits all together. Othewise with just 299762458 one has to count the digits to understand its magnitude.
I thought it was great, in content and style. I don't know what I did to deserve such dedication by some people who try to understand the world and then explain it to me.
Great！The first time I had understand general relativity is from the lecture of Leonard Susskind. Before that I have watched many lessons and videos and books about GR, but all are in futility, I just cannot master the idea of general relativity, until I check Leonard Susskind's video, it's a blessing and truly an enlightenment.
I like how he says you have to memorize Planck's constant, then reads it off a piece of paper ^_^
first two digits and exponent are all i needed to memorize i just also had to know that wasn't all
but omg the one that really gets my goat is when a professor says there isnt a book for the class then sells you their pdf. always the skumbag hustle with so many profs i had.
Perhaps funnier is he did the same with c but mis-transcribed it.
The Professor so enjoys the discussion and questions. Can’t imagine what life would be for him without this interaction. Like air for us!
Thank you Standford thank you L.Susskind for your wonderful lectures
Thanks for keeping these up here! Loving Prof. Suskind. what a special guy!!
11:50 - What? The periodic table is VERY well organized. It's not "exactly" periodic, but it absolutely reflects the filling of different stages of orbital structure.
planck's constant is not h-bar,
plancks constant is h
h bar is the reduced plancks constant which is h/2pi
When you ask "what practical use" that is the moment that you stop being a scientist. Nothing fundamental has ever been discovered by asking "what practical use does this have". You find applications *later*, understanding the inner workings of the world around us is a worthy enough ambition.
Another thanks to Stanford University for the great (and free!) lectures. I had an interest in this subject but never dreamed I could get a lecture (from Stanford, none-the-less) for free.
I really enjoy your lectures. Thank you so much for posting them. Your explanations are always clear and understandable. Cheers
Great lecture! Minor error at 2:15 - the atomic number of Helium is 2. Its atomic mass is 4.
An excellent delivery for the layman to follow
thanks alot, great stuff.
I love how at about 1:42:00 something as simple as w = 2 x pi x f manages to confuse even the smartest of people.
You're a gifted teacher. Thank you.
The undergrad pre med joke at 38:04 made me really laugh as an MD who attended that lecture :)
sick burn lol
I love these lectures! Mr Susskinds accent reminds me of a Sopranos cast member, "Hey I'm gonna teach you about atoms or whatever the fuck!"
1:06:00 "c=2.99762458 * 10^8 m/s plus or minus something in the last digit". Actually it's exact as of 1983, since that's how a meter is defined. Except there's a typo, it should be 2.99792458.
Every time I fall asleep and wake up in the morning and open my YT app, I’m on one of this guys lectures. How tf do i go from skyrim to this.
Explain the double slit experiment using classical physics, and you have a Nobel prize waiting for you.
You are my hero! I like your teaching style.
Interesting video, hats off to the lecturer, really enjoyable. A person in the audience asked why Planck's radians were measured at 2 times pie times frequency, my guess is that he looked at the field as a radiating circle first and then used the associated Math to express his evaluations. Thanks Leonard.
beautiful!!! Thank you Mr.Sussikind
this has better audio than the MIT lectures on YT, and that came out in 2015
Be more considerate - he is in his seventies now. Imagine how many profs can explain this so crystal clear in their seventies?
How does age effect how well you can explain something. I had elderly physics professors as well. They were articulate.
Absolutely brilliant lecture. Thank you, Professor Susskind!!!
We love you Susskind!
I am certainly way ahead of you on my understanding of modern physics.
"QM is a subtle and difficult subject. Yet, in his QM series, he said "Everything in QM is easy".
@universalsailor Exactly, I'm not sure where i read this, but the quote goes something like this."If your theory can't explain something in basic words, then it's not much of a theory."
Why does this video have any dislikes? Thanks Stanford, great videos
He has a talent for communicating tough concepts. For those who
Watching after 14 years and still pleading on eyes ❤😂
I'm tired of people saying how old they are. It doesn't matter; just watch the video.
Thank you Lenny!
@imthetopstoner simply, the flux of energy from the sun is distributed on concentric spheres of larger and larger radius, so the energy per unit surface is smaller and smaller. :)
My favorite hero. Dr sussnind
At what point does the color of an object vanish as you break apart the object into smaller and smaller parts.
forms of light, solids, liquids, gases, plasmas, variations in gravity, motion, energy and time all fall into this category.
When it is said that the speed of light has limits, what type of light is referred to? If nothing can move faster then the speed of light.
Sorry if this seems arbitrary. I am not a physics expect just a theorizer. Please feel free to enlighten me.
I suppose you could try an experiment on mars simultaneously as on earth to prove the correct speed of light.
Amazing way of thinking 👏
You are so right. An amazing ability to communicate this stuff.
So when the filter has a certain thickness, the blob changes into little blibs?
Great teacher. Thank you so much for free sharing.
Such an effortlessly gifted teacher, yet a pioneer - such a rare combination
You missed the entire point. Yes, transistors have been around since the 50's, and they were invented using quantum mechanics. COMPUTING can function without quantum mechanics, before the transistor we used electron tubes, but the MODERN COMPUTER would not have been possible without it. Todays's transistors are too small to be constructed without quantum mechanics taken into account.
I would also be delighted to see how you deal with the century of experiments backing quantum mechanics.
follow all of these lectures if you want to know what the Higgs Boson is. Dont worry about the math, you will follow the arguments without being able to take an exam in it - This guy is a total genius at explaining complicated stuff whilst focusing on the key ideas that almost anybody can grasp ~ or having heard the explanation could google and understand. Brilliant fun, thanks Leonard.
1:06:21 isn't speed of light c equals to 2.99792458 x 10^8 m/s instead of 2.99762458 x 10^8(instead of 6 should be 9)
What you seem to have a hard time gripping is this: Quantum mechanics is a MODEL describing the behaviour of atoms and subatomic particles, and it has passed all experimental obstacles for a century. These are the only things important. A model does not have to be a perfect representation of reality, the only important feature is that it can make accurate predictions. Newtonian mechanics is not perfect and does not make perfect predictions - but it works in the scale it was meant to be used.
I had no idea Nosferatu was a physics professor...brilliant!
That's his day job. He moonlights as a vampire. Guess I'm not the only one who noticed.
I wish there more people like him doing lectures. I play Minecraft while I am listening to him.
Typo at 1:06 - the speed of light is 299,792,458 m/s and is now an exact figure (I have removed the error that was in here; thanks to Christian Farina for spotting it).
Typo at 1:09 - he put an extra 5 in h-bar, as it is actually 1.054 571 800 x 10^-34 by the latest (2014) CODATA measurement.
At 1:19, G=6.674 x 10^-11 Newton-meter^2/kilogram^2
(that's all the accuracy possible at this time)
+Jeff Rey So a meter has been redefined to be 300,000 kilometers?
Christian Farina Here is a link to how these basic units have been defined over time:
physics.nist.gov/cuu/Units/meter.html
After reading about the meter, go to the definition of the second and it should clear things up.
Jeff Rey My point was that the definition of a meter is not 'the distance light travels in one second.' That distance is 300,000 km, more or less.
Christian Farina Ye gods, you're right! That was one spectacular goof on my part, so apologies. One light-nanosecond is a distance of one foot, by the way.
I have no arrogance, and I have been a scientist for over 47 years. All of my projects actually work.
Answer for 1:28:12 : e^(-iw) is in the Fourier transform, plane-wave equation, Schrödinger eq, etc... 1=e^(i*2*pi)
I like the way that each time a student ask a question, he grabs something to eat. :-)
Beckerell upper and lower bounds the trajectory to observe it. Beam splits with magnetic field.
Not just the idea but the video is also now ancient.
I wish people would shut up and go to his office hours for explanation instead of ruining the lecture for everyone.
I know where he got the units but, where did he get that value of h? ...1.05455...*10^-34?
"It's more a question of biology than physics" . Susskind is hilarious
Have you ever watched this "brownian" motion? If you are quick you can clearly see that it is not random. The movement is precise to the action / reaction. The best way to see this is to watch closely only one object. If you can write a program to show this as "science" does to illustrate this motion, then it is not random by the fact that it can be programmed.
Is the best and amazing teacher ever
❤Thank you very much Professor and class
Anyone please provife me the best channel which explains basics concept of physics
In science, there shall be always a need to ask a LOT of questions. That is one of the most efficient methods people use to expand their knowledge of everything. Aside from that, asking questions is a necessity for life. If you want to know, then ask! If you don't want, then don't lull people into your absurdity.
Can you tell me ONE new breakthrough that has come from science in the last 40 years?
Unless I am mistaken the last breakthrough was the IC chip. Which really isn't a breakthrough, but a new way to put "transistors to work".
We use the same exact principles in computers, we use the same aerodynamics, the same ideas for everything.
Do you understand how insulation works, like foam boards? In the classes on thermal engineering to they even understand how it works. What principles it uses?
"Actually a particle is not energy, its is a point is space-time where an interaction is taking place, energy is moved about during these interactions."
HEMG.
A lot of people with the gene for sickle cell anemia don't die of malaria, which is common in their area. That's why it's considered a good mutation. Genetic mutations can be both good and bad.
Absolutely well done and definitely keep it up!!! 👍👍👍👍👍
Is this the type of particle physics course that graduate students take.
why are photons in feynman diagram written as plane waves when photons are wave packets?