Professor Dave, I am an undergrad physics student in the middle of their 3rd semester of physics, who is about to enter the world of quantum mechanics. I just want to say that you truly have a gift for communication and teaching. The way you break down complicated concepts into manageable parts is unmatched by anybody I have ever since. From humiliating flat-earthers to bullying James Tour, I cannot get enough of your content. I hope there is lots more to come.
About a year ago I dove deeply in quantum mechanics, almost as a hobby. Determined to understand the significance of the finding the Higgs-Boson particle, and why the construction of the LHC at CERN, led me into the depths of quantum mechanics. Not once in the dozens of hours I spent reading about quantum mechanics did I see the simplicity of the standing wave of an electron, and its relationship to the Schrodinger equation, like I just saw in less than 7 minutes. Thank you for taking the time and making the effort Prof. Dave!
Exactly what I thought. I was always taught that the Electron can’t move between energy levels but I never knew why. This explanation makes so much sense and helps me understand it so much more now.
Quran says: “Allah:there is not God except he”:The Neccessary life/consciousness,sustainer of life/consciousness.” Wire like neuronal structures that conduct electricity via ions/neurotransmitters in the CNS/PNS possess no attribute of thinking/life and yet that has “randomly” led to life. Consciousness/thinking is an innate idea(“Fitra”)that is distinct from carbon skeleton and yet the materialist scientist believes that chemistry turned into biology via “god of randomness”/”Emergent property”/”law of nature”. Consciousness can only stem from Necessary Consciousness (Allah-one/indivisible/loving/self-sufficient perfection)
This is by far the best description I've ever seen on Quantum Mechanics and the Schrodinger Equation. Simply brilliant Professor Dave! It's the first of your series I've watched and it most definitely gives me a reason to subscribe and watch more. Thank you very much.
At the bottom of every Video made by western people there always will be a comment says xxx is the best thing I have ever heard which definitely is a wrong statement that even the RUclips themselves would deny. This is very wield to me. is that just a common sentence used for politeness that do not have any specific meaning?
@@tachyontardyon237 I found this to be most absolutely true. It is stunning to see that even some of the most devoted have read only the small snippets of the most quotable books in the Holy Bible. Usually because that's all that their single serving of weekly spirituality will discuss, typically repeated on a yearly cycle. Some of us scientific minded people want evidence, or at the very least the preponderance of it. Same goes with the bible, we read it at face value with a basic understanding. Studying outside a group that may contaminate it with a specific denominational interpretation. I found that a disproportionate percentage of "Christian" Churches teach and allow(according their biblical text) false idolatry. Praying to Jesus or any one of the saints rather to God is in violation of their second commandment. When I asked, they say, " we dont pray to them, we pray *thru* jesus or saints.." But I still hear prayers TO Jesus and when listening to a congregation or other services it does not seem to be the case. Most "Christians" do not have any grasp of the religious teachings that they are basically brainwashed into believing that they are. Subsequently and unintentional leading astray many others.
@Dirk Knight Well, a little elaboration would be nice. You cant just just drop bombs like that and then jam off without an explanation... well, I suppose you can, but I'd still like to know what the wrong information is. That's about as bad as the nightly news with the scare and building terror teasers; "A common household product you probably have in your refrigerator right now has been recalled for flesh eating bacterium known for targeting only the genital areas. The good news is most of the necrosis is painless and visual side effects are minimal although people with fleshy external reproductive organs should be extra cautious as Leprous penile shedding is known to occur..... Join us at 11 to find out exactly m what that product is at 11-12" central.
@Dirk Knight Smh, as I thought sir. Let's uh,... let's... wait... I cant Lol, Seriously!? 😆 Seriously brother? You gonna do it like that? I mean, come on man, just be straight. I promise I'm not your typical cough* human. Okay clearly, I'm dismissing the obvious baited comment on my mental state. I can accept and admit my faults; I can also accept that others cannot or will not accept theirs. I can live with it easily either way. But just for the fun of it, can we take a quick look at this situation for a second? (Obviously rhetorical...) So its plausible that one of two things is going on here based on your response; 1. You dont do so well with reading comprehension or 2. Your comprehension is just fine and you purposely deflected my question about what you claimed is wrong in the video because there ISNT anything wrong in the video so you respond like I asked for something completely outrageous (like explaining quantum theory) so you could be justified in your denial to answer the question. Wanna let me (us) in on your "its all wrong" secret that no one else seems to be aware of but you. Then when pressed to clarify your statements your typical response; Answering a question that was never asked in the first place. So, I'll ask it again, and please understand I'm not asking for a doctoral thesis here mr. Schrodinger, one sentence (damn bro... you know what?! I even stated that pretty dang clearly in my previous comment so how th'hell could you.... you know what, smh, forget it, lol) so anywaaay, I'm giving you the benefit of doubt here, by taking your blatantly baited comment on the validity of this videos content. Im open to new perspectives; I'm not loyal to any paradigm but the search for knowledge. SO... you care to make a short statment on what you current belief of what is wrong in this video? Oh, damn son!! Theres a third option I almost completely overlook! Lol, durp.. You, my short tempered, furry eyebrowed friend, are a trolling!!
@@trupyrodice4462, you have quite some nerve calling other religious people brainwashed. You are equally as brainwashed as they are, and perhaps even more arrogant. It is all a load of baloney.
This is the best explanation of quantum energy levels I have ever seen. It makes so much sense that a photon can cause constructive interference when it collides tangentially with a circular standing wave. Thank you!
As a physics major, this is one of the best explanations of wave particle duality I have come across, and while I havn't actually messed around with the schrodinger equation yet, i have done the double slit experiment, worked with standing wave equations, ect. This is brilliantly concise and amazingly informative. Thank you sir.
man I just had a modern physics exam this morning & spent all night last night watching this playlist. if it wasn’t for your videos, i wouldve failed that exam but i felt so comfortable in answering all the problems. thank you SO MUCH
Could you help me understand what normalizing the wave function conceptually gives you? Does it just proves it’s somewhere in the area marked by the parameters of the integral?
The visual you added with the electron energy levels and standing wave would have made learning certain sections of chemistry and physics in college so much easier. When my kids ask about wave nature im pulling this video up.
This is the single best explanation of the difficult concepts of wave particle duality and the quantum nature of energy I have ever heard. Absolutely brilliant! Thank you.
me a 14 year old just learning about physics in my free time instead of doing my biology homework. Update: working on college applications for aerospace engineering (october 2023)
@@Alex-lt5ho Idk man, I'm with you guys on the whole Physics instead of homework thing, but I'd take the argument that a virus is nonliving over living any day.
W. Schumann at this point I’m doing it out of spite to my teacher because she refused to allow me to argue that it was living, even though she made it seem like we had a choice.
I found you while doing my undergrad in medicine and now that I have my degree, I still keep coming back for more. Thanks for the work you do on these.
Best science communicator I've found, no matter what you explain I will understand! Honestly I'm learning my undergraduate calculus course from you, your videos are 5 minutes vs my 2 hour lectures covering the same concept
Thanks sir, i was confusing in my chemistry classes as to why the energy is quantised, the book tells that it is quantised but didn't tell why it's so. thanks a lot again.
Erwin Schrodinger was one of the greatest geniuses in human history but he lived in the Einstein's and Tesla's time and because of that he stayed relatively anonymous
@jameson1239 these names are more common in "science" circles. I think the mathematicians that made lot of these maths equations possible are way more underrated.
which state? By the way, The way he explained heisenbergs uncertainity principle is simply awesome. He and pahul sir have made me understand chemistry lectures for jee pretty well besides by coaching teacher who barely explained which quite a bit confused me.
Beautifully explained and summarised - imo every embarking physics and electrical engineering undergrad would get tremendous value from watching this (alongside anyone else wanting to find out more about quantum mechanics)
Such a smooth presentation: you stick to your main point, which is very rare in Physics videos (most presenters tend to cloud the matter with to many tangents/cliffhangers)! I really like the clarity of your language and the use of colour codes to guide us through your talk. Now off to Heisenberg's...
Well stated! I studied chemistry and used this equation and many others! Of all the people offering explanations on youtube yours is the most accurate! In the end the understanding of the particle and wave function of subatomic particles and the probability of where in space they can be found especially in relation to other particles or atoms allows us to accurately predict chemical reactions (molecular, atomic, or subatomic) thanks so much!!!!
Thank you for being objective and truthful about interpretations of quantum mechanics. Far too many people (especially followers of Everette) talk about the interpretation they follow as if it's a known fact.
@@oritsejolomiokirika9913 I;m not sure I understand your comment. Are you saying that my comment is uninformative? I should hope so, for my intent was to thank the creator of the video, not to provide any information.
This is the best conceptual explanation of orbitals so far. Have always struggled with the idea of excitation of electrons but now this makes a lot more sense!!
Thanks Professor Dave. This video goes a long way in helping me tie together and explain concepts about quantum mechanics that I've read about or seen in other videos.
I sincerly want to know which degree Professor Dave has, as a chemistry student I consult him for almost all my classes. But I have seen that he also has a lot of physics and other science vid's.
at 1:25 you say that the electron is a circular standing wave, but considering orbitals, shouldn't we say that electrons are _spherical_ standing waves? As in, they are 3 dimensional in nature and aren't stuck to a specific orbit like the classical (and erroneous) atom model would suggest? P.S.: I'm a fan of Bohmian mechanics
This is the future of education. i'd be happy if public schools let teachers put these type of vids instead of backwards boring vids that pass the time and are hard to follow. The colour coding has helped everything sink in.
The bit about the standing wave explanation for orbitals was great. I first saw that many years ago in an old copy of Resnick and Halliday (I think), and I thought it was so good. But your version is even clearer. It also made me have an epiphany, that perhaps it is a mistake to introduce subatomic particles as 'particles', ie objects resembling billiard balls. If you think these are just a new kind of phenomenon, then the maybe the confusion of wave-particle duality could be avoided. Anyway, thank you, love your work.
@ 5:47 "Before you choose a camp" Comment: There is a book about scientific revolutions which claims new understandings in science often come about not because everyone agrees, but that older scientists pass away, and now the new understanding can proceed. This impeding seems to be choosing a camp. There is another explanation. In doing anything, limited resources of time, materials, people, etc. must be allocated. Decisions need to be made. Someone might decide that a new explanation has not been sufficiently researched and not worthy, or be a Not Invented Here (NIH) person. Either way, science has limitations similar to other endeavors: limited resources.
Do you speak of Kuhn? I do enjoy a good paradigm shift. I don't think it's fair to generalize that old scientists hold back the progress of science, but there is probably some legitimacy to it, at least in subtle ways.
Sorry Professor Dave, I read the book in college decades ago. I did a quick Google search before posting, but didn't find it. There is yet another explanation, that science is held back to prevent new industries from forming which would displace current ones. One of these, before our time, was whaling oil for light vs. electricity. Thankfully electricity won. Sometimes this falls into the category of sensation false conspiracy theories. Thanks for these videos. I think they are a little light for those with college education, but I wanted to start refreshing my memory. It think they are great way for pre-college students to help decide if they want to pursue these lines of study, and help bring out information for the general public. I have only seen about 3 your videos. There is a video depicting the general shape of the electron around a hydrogen atom using Sch. equations. I also understand computers are being used to model atoms and molecules, seems like a more economical way to search for materials which might have the desired properties, then spend more significant resources trying to produce it. All the best!
why? this video only helps define a buzzword. Simplifying the real bulk of QM would be an amazing vid. This one does not even approach that achievement
It's pretty weird, when de Broglie presented his research for his doctorate the school had no idea what he was talking about so they asked Einstein and he said, I don't know what he is talking about but this is an insightful theory give him his PhD. The jist is that particles propagate as a wave (the electron cloud for instance) but interact like a particle (imagine billiard balls). This duality is quintessential to the weird nature of quantum mechanics. If classical things were more quantum mechanical, people would wonder why waves when crashing into the beach make no sound (distribute no energy) except for causing a single grain of sand to go into space (the particle interaction between the sand and the hypothetical ocean wave particle with the energy wave). I like to think of a rendition of Mike Tyson's famous line, float like a wave sting like a particle, hahaa
Why do the circular standing wavelengths need to be integer numbers though? Could the cycle not just end at a slightly different position each time after a small amount of energy is added? Like following the same path but at a slightly higher frequency? Interesting video :)
Why do the circular standing wavelengths need to be integer numbers though? Because a non-integer obit would have too little or too much energy (going too slow or too fast and be on its way to a lower or a higher orbit.
I just had a flashback to an office hours I went to with my QED professor... All he kept saying was, "Yeah, cool..." "The equations work. No idea what it actually means."
1:37 _Given that increasing number of wavelengths means more energy carried by the waves....."_ Are you sure?????? DECREASING wavelength (i.e. increasing frequency) means more energy carried by the electrons. "Wavelength" and "number of waves" are inversely proportional.
Correct, increasing number of wavelengths or wave cycles per unit time means shorter wavelength which means higher frequency which means higher energy.
He did not like the popular conceptual story around the math (how what happens is explained in words) - which is a fairy story similar to the princess kisses the frog and he turns into a prince.
I'm studying this at Uni at the moment, the level of prerequisite mathematics required is well and truly extensive as fuck. Especially the merger of linear algebra and applied calculus, there's just so much to know. Feels amazing when you manage to get it all working together though, it feels like magic!
Also great video, we only have really covered the Born interpretation (modulus of the wavefunction squared is = to the probability of locating the particle at a particular point in space), I'm interested as to what the other interpretations cover/have to offer. Also the infinite potential well is a cool thought experiment-esque example that anyone interested could look up, it directly relates to all of this.
Schrodinger did not invented the quantum numbers. The wave function have 3 parts .all 3 were polynomials which depends upon some numerical values out of which One is a natural number..that's n Other is a whole number with a constraint that it's maximum value is 1 less than the natural no. That's l.. azimuthal q.no. And the third number was a integer in range of -l to +l These constraint were assumed to get the normalised wave function or the eigenvalues values of the energy of the electron inside H atom
it's the diagram from which the parsec is derived! i will explain that concept in astronomy tutorials later this year! i might even do an "ask professor dave" about it, new playlist idea!
have a much simpler and shorter explanation for the Uncertainty Principle: Imagine a car moving along a road. If you want to see the exact place where the car is, you must pause time (because it's always moving). You pause time, and you mark its place. While you paused (imagine it like a photo), you CAN'T know its speed. It's a picture. If you want to find out the speed, you must unpause and measure it. But if you unpause, it's impossible to know the exact position of the car because it's changing... EDIT: Because many people cannot understand that if you put a speed-o-meter in a car you still measure the velocity in an interval and not in a point, imagine it like a video that you pause it and unpause it. You cannot interact with the car to put a speed-o-meter of some sort, because if you do, this is not the same example.
well that's an interesting way of looking at it, but the problem is that the car does indeed have a precise location and instantaneous velocity at all times. even if you pause time, it would have a vector telling you its velocity at that precise instant. instantaneous velocities and accelerations are everywhere in calculus, which has a lot of application in classical mechanics, which is what cars and other macroscopic objects abide by. the difference is that with quantum systems, a particle like an electron can't be said to have both a precise position and momentum simultaneously, which makes it completely different than a macroscopic system. this is due to its wave/particle dual nature.
@@ProfessorDaveExplains But taking a photograph of a car changes the cars energy very little, while determining the velocity of an electron gives it a (relatively) enormous jolt.
your explanation is awesome and easy to understand but .....it sometimes doesn't feels alive..doing that may make your videos more cool....again...your explanation was really nice and effective
Professor Dave, I am an undergrad physics student in the middle of their 3rd semester of physics, who is about to enter the world of quantum mechanics. I just want to say that you truly have a gift for communication and teaching. The way you break down complicated concepts into manageable parts is unmatched by anybody I have ever since.
From humiliating flat-earthers to bullying James Tour, I cannot get enough of your content. I hope there is lots more to come.
About a year ago I dove deeply in quantum mechanics, almost as a hobby. Determined to understand the significance of the finding the Higgs-Boson particle, and why the construction of the LHC at CERN, led me into the depths of quantum mechanics. Not once in the dozens of hours I spent reading about quantum mechanics did I see the simplicity of the standing wave of an electron, and its relationship to the Schrodinger equation, like I just saw in less than 7 minutes. Thank you for taking the time and making the effort Prof. Dave!
Exactly what I thought. I was always taught that the Electron can’t move between energy levels but I never knew why. This explanation makes so much sense and helps me understand it so much more now.
But what that standing wave is made up of
Quran says: “Allah:there is not God except he”:The Neccessary life/consciousness,sustainer of life/consciousness.”
Wire like neuronal structures that conduct electricity via ions/neurotransmitters in the CNS/PNS possess no attribute of thinking/life and yet that has “randomly” led to life. Consciousness/thinking is an innate idea(“Fitra”)that is distinct from carbon skeleton and yet the materialist scientist believes that chemistry turned into biology via “god of randomness”/”Emergent property”/”law of nature”. Consciousness can only stem from Necessary Consciousness (Allah-one/indivisible/loving/self-sufficient perfection)
There is a class at JHU taught by one of the people who discovered this boson
@@bluesky45299 Interesting. I want to learn more about this.
Me: doing absolutely nothing.
My brain: "He knows a lot about the science stuff. professor Dave explains!"
yeah 😂
Correction: He does lot of science stuff. Professor Dave explains!
@@prneethvaila2112 no he is correct. It's he knows a lot about.
Same!
This is like one of the best RUclips channels I have ever discover
Same here
Yeah
exactly
Hiii
I totally agree
I’m doing chemistry and all the textbook stuff flew over my head. This video was so helpful connecting all the different ideas together. THANK YOU!
This is by far the best description I've ever seen on Quantum Mechanics and the Schrodinger Equation. Simply brilliant Professor Dave! It's the first of your series I've watched and it most definitely gives me a reason to subscribe and watch more.
Thank you very much.
At the bottom of every Video made by western people there always will be a comment says xxx is the best thing I have ever heard which definitely is a wrong statement that even the RUclips themselves would deny. This is very wield to me. is that just a common sentence used for politeness that do not have any specific meaning?
@@tachyontardyon237 I found this to be most absolutely true. It is stunning to see that even some of the most devoted have read only the small snippets of the most quotable books in the Holy Bible. Usually because that's all that their single serving of weekly spirituality will discuss, typically repeated on a yearly cycle.
Some of us scientific minded people want evidence, or at the very least the preponderance of it.
Same goes with the bible, we read it at face value with a basic understanding. Studying outside a group that may contaminate it with a specific denominational interpretation.
I found that a disproportionate percentage of "Christian" Churches teach and allow(according their biblical text) false idolatry. Praying to Jesus or any one of the saints rather to God is in violation of their second commandment.
When I asked, they say, " we dont pray to them, we pray *thru* jesus or saints.."
But I still hear prayers TO Jesus and when listening to a congregation or other services it does not seem to be the case.
Most "Christians" do not have any grasp of the religious teachings that they are basically brainwashed into believing that they are. Subsequently and unintentional leading astray many others.
@Dirk Knight Well, a little elaboration would be nice.
You cant just just drop bombs like that and then jam off without an explanation... well, I suppose you can, but I'd still like to know what the wrong information is.
That's about as bad as the nightly news with the scare and building terror teasers; "A common household product you probably have in your refrigerator right now has been recalled for flesh eating bacterium known for targeting only the genital areas. The good news is most of the necrosis is painless and visual side effects are minimal although people with fleshy external reproductive organs should be extra cautious as Leprous penile shedding is known to occur..... Join us at 11 to find out exactly m what that product is at 11-12" central.
@Dirk Knight Smh, as I thought sir.
Let's uh,... let's... wait... I cant Lol, Seriously!? 😆 Seriously brother? You gonna do it like that? I mean, come on man, just be straight. I promise I'm not your typical cough* human.
Okay clearly, I'm dismissing the obvious baited comment on my mental state. I can accept and admit my faults; I can also accept that others cannot or will not accept theirs. I can live with it easily either way. But just for the fun of it, can we take a quick look at this situation for a second? (Obviously rhetorical...)
So its plausible that one of two things is going on here based on your response; 1. You dont do so well with reading comprehension or 2. Your comprehension is just fine and you purposely deflected my question about what you claimed is wrong in the video because there ISNT anything wrong in the video so you respond like I asked for something completely outrageous (like explaining quantum theory) so you could be justified in your denial to answer the question.
Wanna let me (us) in on your "its all wrong" secret that no one else seems to be aware of but you. Then when pressed to clarify your statements your typical response; Answering a question that was never asked in the first place.
So, I'll ask it again, and please understand I'm not asking for a doctoral thesis here mr. Schrodinger, one sentence (damn bro... you know what?! I even stated that pretty dang clearly in my previous comment so how th'hell could you.... you know what, smh, forget it, lol) so anywaaay, I'm giving you the benefit of doubt here, by taking your blatantly baited comment on the validity of this videos content.
Im open to new perspectives; I'm not loyal to any paradigm but the search for knowledge. SO... you care to make a short statment on what you current belief of what is wrong in this video?
Oh, damn son!! Theres a third option I almost completely overlook! Lol, durp.. You, my short tempered, furry eyebrowed friend, are a trolling!!
@@trupyrodice4462, you have quite some nerve calling other religious people brainwashed. You are equally as brainwashed as they are, and perhaps even more arrogant. It is all a load of baloney.
This is the best explanation of quantum energy levels I have ever seen. It makes so much sense that a photon can cause constructive interference when it collides tangentially with a circular standing wave. Thank you!
As a physics major, this is one of the best explanations of wave particle duality I have come across, and while I havn't actually messed around with the schrodinger equation yet, i have done the double slit experiment, worked with standing wave equations, ect. This is brilliantly concise and amazingly informative. Thank you sir.
man I just had a modern physics exam this morning & spent all night last night watching this playlist. if it wasn’t for your videos, i wouldve failed that exam but i felt so comfortable in answering all the problems. thank you SO MUCH
Could you help me understand what normalizing the wave function conceptually gives you? Does it just proves it’s somewhere in the area marked by the parameters of the integral?
The visual you added with the electron energy levels and standing wave would have made learning certain sections of chemistry and physics in college so much easier. When my kids ask about wave nature im pulling this video up.
This is the single best explanation of the difficult concepts of wave particle duality and the quantum nature of energy I have ever heard. Absolutely brilliant! Thank you.
god bless this, you're saving my physics grade!!
And my Chemistry Grade
Not mine because I am only 14 Lol
My math ❤️
@@BINOD12345_--... yes 😂😂😂
Same but switch this and you
me a 14 year old just learning about physics in my free time instead of doing my biology homework.
Update: working on college applications for aerospace engineering (october 2023)
Wow
Same
Holy fucking shit no way me too. I’m actually learning about Schrödinger’s cat to argue that a virus is both living & non-living.
@@Alex-lt5ho Idk man, I'm with you guys on the whole Physics instead of homework thing, but I'd take the argument that a virus is nonliving over living any day.
W. Schumann at this point I’m doing it out of spite to my teacher because she refused to allow me to argue that it was living, even though she made it seem like we had a choice.
All of your words pierced straight into my brain without meeting any conflicting thoughts, it's almost like magic.
this is poetic
I found you while doing my undergrad in medicine and now that I have my degree, I still keep coming back for more. Thanks for the work you do on these.
congoa nd cute dog btw.. i hope she/he is alive !
as a German Engineer I am really jealous how marvelous American scientists can explain such complicate matters...Thumbs UP! ;-)
WOW! YOU ARE AN EXCELLENT EDUCATOR! NOW I CAN SHARE THIS TO MY CLASSMATES THANK YOU
Best science communicator I've found, no matter what you explain I will understand! Honestly I'm learning my undergraduate calculus course from you, your videos are 5 minutes vs my 2 hour lectures covering the same concept
Thanks sir, i was confusing in my chemistry classes as to why the energy is quantised, the book tells that it is quantised but didn't tell why it's so. thanks a lot again.
Bhai 11th Mai ho naa
Me too
Very helpful videos
@@sweetdemon5372 yup same
New subscriber. Professor Dave explains the concept not only brilliantly but with the minimum number of words. Wow.
Erwin Schrodinger was one of the greatest geniuses in human history but he lived in the Einstein's and Tesla's time and because of that he stayed relatively anonymous
That is tragic in light that Einstein is the greatest fraud...
@@Mathin3D ???
There are so many underrated geniuses from that time Max plank, Paul Dirac, and Neil’s Bohr are just a few examples
@jameson1239 these names are more common in "science" circles. I think the mathematicians that made lot of these maths equations possible are way more underrated.
@@jameson1239 agreed
Love the analogies and annotations as the pictures and visual aids change,providing clarity about a very messy,conceptually complex equation
i watched this in class 11th and this helped a lot ,helped me get back on track in chemistry for my JEE
which state? By the way, The way he explained heisenbergs uncertainity principle is simply awesome. He and pahul sir have made me understand chemistry lectures for jee pretty well besides by coaching teacher who barely explained which quite a bit confused me.
Okay never miss the boat
Beautifully explained and summarised - imo every embarking physics and electrical engineering undergrad would get tremendous value from watching this (alongside anyone else wanting to find out more about quantum mechanics)
I am also an electrical engineer
Such a smooth presentation: you stick to your main point, which is very rare in Physics videos (most presenters tend to cloud the matter with to many tangents/cliffhangers)!
I really like the clarity of your language and the use of colour codes to guide us through your talk.
Now off to Heisenberg's...
Well stated! I studied chemistry and used this equation and many others! Of all the people offering explanations on youtube yours is the most accurate! In the end the understanding of the particle and wave function of subatomic particles and the probability of where in space they can be found especially in relation to other particles or atoms allows us to accurately predict chemical reactions (molecular, atomic, or subatomic) thanks so much!!!!
Thank you for being objective and truthful about interpretations of quantum mechanics. Far too many people (especially followers of Everette) talk about the interpretation they follow as if it's a known fact.
How uninformative
@@oritsejolomiokirika9913 I;m not sure I understand your comment. Are you saying that my comment is uninformative? I should hope so, for my intent was to thank the creator of the video, not to provide any information.
Kristaps Balodis Don't bother with me, man; I'm just trolling you.
@kurt mathews What bearing does my ability to spell Everett have on facts regarding interpretations of quantum mechanics?
Bro, 2 trolls in a row with the same response afterwards... wha dee fuc
This is the best conceptual explanation of orbitals so far. Have always struggled with the idea of excitation of electrons but now this makes a lot more sense!!
Dave, here the patience and the enthusiasm leading to an excellent explanation.
He knows alot about science stuff, Professor dave explains🎉
Thanks Professor Dave. This video goes a long way in helping me tie together and explain concepts about quantum mechanics that I've read about or seen in other videos.
This video is brilliant at explaining why waves means energy is quantised.
I sincerly want to know which degree Professor Dave has, as a chemistry student I consult him for almost all my classes. But I have seen that he also has a lot of physics and other science vid's.
Beautiful explanation.... that photon increasing the no. of wavelenghts and promoting it to higher energy state really caught my eye
at 1:25 you say that the electron is a circular standing wave, but considering orbitals, shouldn't we say that electrons are _spherical_ standing waves? As in, they are 3 dimensional in nature and aren't stuck to a specific orbit like the classical (and erroneous) atom model would suggest?
P.S.: I'm a fan of Bohmian mechanics
true enough! they are indeed three-dimensional objects. i'm not quite the expert but it sounds reasonable.
Guess it's just an oversimplification, so that it would be be more understandable
This was amazing, way better than my teacher at uni.
You rock, Professor Dave !
교수가 예수여서 시험시간에 천닝하면 지옥 가것네
Best explanation of quantum mechanics I've come across so far. Thanks Dr Dave!
Omg this was such a clear explanation. Thank you for saving my Pchem grade!
Hello
This is the future of education.
i'd be happy if public schools let teachers put these type of vids instead of backwards boring vids that pass the time and are hard to follow.
The colour coding has helped everything sink in.
Totally coincidental, the video is approximately 2*pi minutes long😂
🔥
Woow❤
Great video showing how quantum physics helps us understand chemistry which involves electrons in chemical interactions.
bruh I was confused on my chem chapter... this helped
The bit about the standing wave explanation for orbitals was great. I first saw that many years ago in an old copy of Resnick and Halliday (I think), and I thought it was so good. But your version is even clearer. It also made me have an epiphany, that perhaps it is a mistake to introduce subatomic particles as 'particles', ie objects resembling billiard balls. If you think these are just a new kind of phenomenon, then the maybe the confusion of wave-particle duality could be avoided. Anyway, thank you, love your work.
This makes so much more since instead of text books jus saying this is how it is learn it, the explanation is helpful
Great explanations, it feels great being able to follow your train of thought and understand the implications of the results described.
Much respect, I can see you really growing!
Thank you for sharing your clarity on this important discovery!!
thank you professor Dave for explaining that, you are awesome
It should be a total derivative of time in your Schrodinger eqn. at 3:30.
야 머리좀 어떻게 해봐... 머리 문제 있어
thank you Professor Dave I have a midterm tomorrow and if I do well it will be bc of you
This was a great explanation with good content that was not to technical to understand, thank you
Professor Dave, I love your videos. Any chance you would go in more details in the Schrodinger equation?
maybe one day if i learn some more physics!
I cannot exxagerate enough how greatly this helped me conceptually, my teacher taught this reallt bad, and i got a test on it in two days
Thank you :D
3:24 As a mathematical student, it makes me really uncomfortable that there are no vectorlines on your symbols...
Go to the end of this modern physics playlist, I'm releasing a bunch on QM that are way more rigorous with all the math.
Dave, you are the best at explaining science. Keep up the good work.
That was great, I've been away from school for so long. Nice to have such a clear, concise coherent review. Thank you.
@ 5:47 "Before you choose a camp"
Comment: There is a book about scientific revolutions which claims new understandings in science often come about not because everyone agrees, but that older scientists pass away, and now the new understanding can proceed. This impeding seems to be choosing a camp. There is another explanation.
In doing anything, limited resources of time, materials, people, etc. must be allocated. Decisions need to be made. Someone might decide that a new explanation has not been sufficiently researched and not worthy, or be a Not Invented Here (NIH) person. Either way, science has limitations similar to other endeavors: limited resources.
Do you speak of Kuhn? I do enjoy a good paradigm shift. I don't think it's fair to generalize that old scientists hold back the progress of science, but there is probably some legitimacy to it, at least in subtle ways.
Sorry Professor Dave, I read the book in college decades ago. I did a quick Google search before posting, but didn't find it.
There is yet another explanation, that science is held back to prevent new industries from forming which would displace current ones. One of these, before our time, was whaling oil for light vs. electricity. Thankfully electricity won. Sometimes this falls into the category of sensation false conspiracy theories.
Thanks for these videos. I think they are a little light for those with college education, but I wanted to start refreshing my memory. It think they are great way for pre-college students to help decide if they want to pursue these lines of study, and help bring out information for the general public.
I have only seen about 3 your videos. There is a video depicting the general shape of the electron around a hydrogen atom using Sch. equations. I also understand computers are being used to model atoms and molecules, seems like a more economical way to search for materials which might have the desired properties, then spend more significant resources trying to produce it.
All the best!
Professor Dave deserves a Nobel Prize....
@Joe Chang May be. But not about physics, that one is certain.
For which discovery?
For what rascal ??
why? this video only helps define a buzzword. Simplifying the real bulk of QM would be an amazing vid. This one does not even approach that achievement
Noble Prize
NOW i understand electrons probabilistic nature, and the schrodinger equation. thanks dave.
Really helpful in learning, thank you pro:)
Thank you for your explanation here in New York City 4:11 a.m. Wednesday November 25th listening I give this video a thumbs up
are you jesus
yeah you really look like jesus
all hail jesus christ amen
jesus is beutifull and i love him
i wish i could have jesus children
It's science Jesus
This is the best vedio I have seen regarding to quantum mechanics. I am very thankful to you sir..
0:25 ah, here goes a further explanation of why I have a wavelength. I still dont have an intuitive understanding of what that means.
It's pretty weird, when de Broglie presented his research for his doctorate the school had no idea what he was talking about so they asked Einstein and he said, I don't know what he is talking about but this is an insightful theory give him his PhD.
The jist is that particles propagate as a wave (the electron cloud for instance) but interact like a particle (imagine billiard balls). This duality is quintessential to the weird nature of quantum mechanics. If classical things were more quantum mechanical, people would wonder why waves when crashing into the beach make no sound (distribute no energy) except for causing a single grain of sand to go into space (the particle interaction between the sand and the hypothetical ocean wave particle with the energy wave).
I like to think of a rendition of Mike Tyson's famous line, float like a wave sting like a particle, hahaa
Wavelength is determined by the optical density of the medium. It shortens when closer to the nucleus.
One of the best RUclips channels ever
Why do the circular standing wavelengths need to be integer numbers though? Could the cycle not just end at a slightly different position each time after a small amount of energy is added? Like following the same path but at a slightly higher frequency? Interesting video :)
the wave must be continuous! if the number of wavelengths was not an integer, it could not be continuous.
Thank you! This would've probably helped me understand my general chemistry course from a while back a lot better :D
Why do the circular standing wavelengths need to be integer numbers though? Because a non-integer obit would have too little or too much energy (going too slow or too fast and be on its way to a lower or a higher orbit.
so simple and concise, very good explanation. thumps up
thank you Sir
미안한데 여자야
I just had a flashback to an office hours I went to with my QED professor...
All he kept saying was, "Yeah, cool..." "The equations work. No idea what it actually means."
are you going to cover quantum fields? :)
you bet!
1:37 _Given that increasing number of wavelengths means more energy carried by the waves....."_
Are you sure?????? DECREASING wavelength (i.e. increasing frequency) means more energy carried by the electrons. "Wavelength" and "number of waves" are inversely proportional.
Correct, increasing number of wavelengths or wave cycles per unit time means shorter wavelength which means higher frequency which means higher energy.
I'm new to this channel, but love the intro :D
well done on the gold play button, proffesor dave is the boss
"Einstien didnt like quantum mechanics...!" :)
It's not really supprising. To this day we still cannot combine Relativty and Quantum physics.
He did not like the popular conceptual story around the math (how what happens is explained in words) - which is a fairy story similar to the princess kisses the frog and he turns into a prince.
Nor do I,apparently.You just need to think,calculating is boring for me.
BECAUSE OF HEISENBERG UNCERTAINTY
Einstein don't like something he couldn't fully comprehend
Thanks for explaining this! I now have a much more clear view of the Atomic Structure according to Schrodinger.
sir ,
please a chapter on time and space.
thanks
watch the rest of the modern physics series, it's all in there!
Thanks sir
너 짱구 좋아하냐 ... 둘리가 짱이지
Great explanations, starting from basics! Subscribed!
Quantum Jesus is the best
This comment is highly underrated
Quantum mechanics the word is so stunning and fascinating itself!!! Can't imagine how interesting and mysterious it would be to study!!!
@Dirk Knight Thanks for suggesting!
So this means that photons also react due to their vibrating wavelength, causing them to move and act like waves.
Im a freshman majoring in bme at washu and these videos are incredibly helpful
will you upload more classes
Excellent explanation, probably the best anywhere on the internet.
"God doesn't roll dice" Is Einstein is mocking bohr?🙄😂
I'm studying this at Uni at the moment, the level of prerequisite mathematics required is well and truly extensive as fuck. Especially the merger of linear algebra and applied calculus, there's just so much to know. Feels amazing when you manage to get it all working together though, it feels like magic!
Also great video, we only have really covered the Born interpretation (modulus of the wavefunction squared is = to the probability of locating the particle at a particular point in space), I'm interested as to what the other interpretations cover/have to offer. Also the infinite potential well is a cool thought experiment-esque example that anyone interested could look up, it directly relates to all of this.
Video is 6 minutes, 28 seconds long.
Seems suspicious ...
Oh well, probably nothing. Hey, anyone want pie? I have two.
ha......ha
Observational haki
Tomorrow I have a 1 in 18 probability I'll need to explain this in an exam. This video was a lifesaver!
I feel as if he's talking like BRIELLE from the Ellen show
bro im studying materials science at uni how have you just explained quanta of electron energy so well to me holy crap
thank you
sir can you explain how Schrodinger invented three quantum numbers
check out my clip on quantum numbers from the general chemistry playlist!
Schrodinger did not invented the quantum numbers.
The wave function have 3 parts .all 3 were polynomials which depends upon some numerical values out of which
One is a natural number..that's n
Other is a whole number with a constraint that it's maximum value is 1 less than the natural no. That's l.. azimuthal q.no.
And the third number was a integer in range of -l to +l
These constraint were assumed to get the normalised wave function or the eigenvalues values of the energy of the electron inside H atom
you have no idea how much this helped, thanks!
Who else here because AI solved this equation this week 😀😀
Professor Dave truly explains👏👏 Thanks a lot this really helped 😅
sir u r amazing but could u please explain about ur tattoo
it's the diagram from which the parsec is derived! i will explain that concept in astronomy tutorials later this year! i might even do an "ask professor dave" about it, new playlist idea!
Quantum mechanics is wonderful, for me is the most interesting part of physics. Beautiful subject.
Thank you Quantum Jesus.I hope, lord shows me the way.
hahaha quantum jesus
Best explanation of the Bohr model I have ever heard.
have a much simpler and shorter explanation for the Uncertainty Principle: Imagine a car moving along a road. If you want to see the exact place where the car is, you must pause time (because it's always moving). You pause time, and you mark its place. While you paused (imagine it like a photo), you CAN'T know its speed. It's a picture. If you want to find out the speed, you must unpause and measure it. But if you unpause, it's impossible to know the exact position of the car because it's changing... EDIT: Because many people cannot understand that if you put a speed-o-meter in a car you still measure the velocity in an interval and not in a point, imagine it like a video that you pause it and unpause it. You cannot interact with the car to put a speed-o-meter of some sort, because if you do, this is not the same example.
well that's an interesting way of looking at it, but the problem is that the car does indeed have a precise location and instantaneous velocity at all times. even if you pause time, it would have a vector telling you its velocity at that precise instant. instantaneous velocities and accelerations are everywhere in calculus, which has a lot of application in classical mechanics, which is what cars and other macroscopic objects abide by. the difference is that with quantum systems, a particle like an electron can't be said to have both a precise position and momentum simultaneously, which makes it completely different than a macroscopic system. this is due to its wave/particle dual nature.
@@ProfessorDaveExplains But taking a photograph of a car changes the cars energy very little, while determining the velocity of an electron gives it a (relatively) enormous jolt.
your explanation is awesome and easy to understand but .....it sometimes doesn't feels alive..doing that may make your videos more cool....again...your explanation was really nice and effective