I am calling it right now. You are the 3Blue1Brown of Physics! This channel is going to get big. I am loving going through your videos to get a a better understanding of physics in this universe. This is fantastic source material of the future when I do decided to start studying physics seriously. Getting to conceptually understand the struggles that past scientists had to deal with when confronted observational data is turly eye-opening. We are standing on the shoulders of giants, and most individuals in our species are unware of their existance. Our modern society exists because of them, and their contributions to the field of phyiscs. KEEP UP THE GREAT WORK!

Dude you're pumping out quality stuff

At high school I never learnt the derivation of the Bohr model. Physics curriculum should be less about exercise and worksheet, more about derivation and a little bit of history.

I am very engrossed in the minimalist style that you present these concepts. The quotes from the scientists are well appreciated. I want to see this channel to grow in to something great.

First time I encountered this was 14 years back in school and today is when I can say I kind of have a grasp of it,thanks to you . I am an art director at a small agency but people like you online keep feeding my thirst for curiosity. Thank you for doing what you do.

from one physicist to another, amazing work! this is so very useful to both the laymen and professional scientists themselves! please do keep up the good work

From content to presentation this was an absolutely outstanding production. Very well done!

Outstanding video and very well narrated.

i really enjoy the way you go into the nuts and bolts of how the concepts you explain actually work. i've seen this subject matter addressed on various other channels, but the actual math is often glossed over or said to be "too hard", etc. i'm glad that you're willing to go into detail, and the clear, concise way in which you go through the details step-by-step make them easy to follow. please keep doing what you do! it's really great!

I’m very glad I found your channel when I did. I’m a physics major in university and just started taking modern physics. Watching your videos in Compton scattering, the ultraviolet catastrophe, and now the Bohr model have helped me immensely. I’m so glad you don’t skip the deep and thorough math either, it only serves to drive home the conceptual explanation you put together. Anyway, just wanted to thanks very much, keep doing what you’re doing!

Amazing how you’re able to breakdown the monumental achievements of Niels Bohr in such an eloquent yet easy to understand manner. I’ve always loved physics since learning about it in high school, but I never understood why it bewildered so many of my peers. I guess it all depends on the way you view and breakdown information and I was blessed with an exceptional teacher whom guided me through tackling everything that is elementary physics. It would be wonderful if all teachers had the language to make learning fun instead of what they are for the most part information dumps that tend to overwhelm most students.

I love KZfaq science videos, but they usually either remind me of things I already knew, or leave me somewhat baffled. This time I learned something new and understood what I was learning - nice one.

As a young aspiring Physicist, I must say, finding your channel is amazing! Watching these videos and then trying to work them out on my own again later and trying my own stuff is always helpful. Thanks for this!

I must say this is the best explanation I have seen on KZfaq or for that matter any other documentary/educational service of the atomic model as conceived by Bohr. Outstanding and kudos to you, Keep up the awesome work.

This is really great content, it is clean, well explained and very usefull. I hope you keep work on this type of video

First of all, Thank you very very much for these videos. This type of videos are the reasons for me to get motivated to understand the majestic beauty of nature/physics rather than running behind marks/degree. At 9:50 I think angular momentum vector would be equal to m(r vector crossed with v), not the other way around.

These really are some of the best physics videos out there. Love how you don't shy away from the math. You can't fully understand physics without the math!

Thank you for this (and your other) masterpieces. The contributions and vision of these earliest quantum pioneers cannot be overemphasized (or overappreciated!)

I'm really pleased to watch great content in this channel. Keep recording videos about the beauty of physics.

This is amazing, please make more of these in depth explanations on these interesting topics!

Wow , I subbed after watching the first five mins of the vid , you are clear, concise and you articulate well, i can’t wait to catch up on your previous vids and learn something. Thanks for the upload . R .

Excellent video. The straightforward calculations and succinct explanations are much appreciated. Keep up the good work.

Just discovered your channel. I am loving it. Just wow! Really good stuff, man! Congratulations!

Like the other people said, I hope this channel never loses its quality in the subject of the videos and its production. This channel is a rarity in so many ways that I really hope you continue this. Its really good. Outstanding, I would say.

Well done! Well written! Wonderful seeing the photos. Thank you.

I really, really enjoy your videos. I am a post-doctoral researcher in atomic and molecular physics. I work with quantum mechanics, molecular simulations and all sorts of things related to the atomic structure of materials and stuff. These things that you have been teaching are the bedrock upon which my entire field of research rests (apart from that one where you compute the distance between the Sun and the Moon) and you still managed to make me look at those things with fresh eyes. You have a good educational method, keep up the good work, we need communicators like you.

I really love these videos because you don't explain the topic and call it a day, but also you do it just like the physicists form then developed their theories. This way it's so much more logical and understandable to arrive at those concepts and formulas. Thanks!

I SO admire your regard for the young students who thought about these things a hundred years ago. Yes they were students, unknowns. They spent decades cogitating. And we are spoon fed this stuff in minutes. And back then, to engage in this endeavor had no promise of economic success. No VCs, no patreon, no kickstarter. No promise of applicability or consideration of market. I wonder what motivated people like Maxwell, Bohr, Thomson, Rutherford,etc.. Your presentation is so engaging. Someday, perhaps an AI will weave these you tube videos into threads and tapestries so we can understand the human dimension as well as the abstract. But until then we only have a few people like you.

Is this my new favorite science channel? I think it is

I am learning all over again! This channel is going to be big. Make more videos and keep us awestruck!😀😀🤘

Man this is an awsome video! I was always baffeled on why we can see what stars and planets are made off so many lightyears away because of the spectral lines. I never knew how the spectral lines worked for each kind of atom, but now I do. Thanks for this amazingly simple explanation!

Keep them coming! Another incredible video. Great work.

These physics videos are among the best I've seen. I admit the maths gets a bit beyond me, but I remember enough High School maths to at least understand what is going on. It is the explanatory diagrams and the helpful narration that I like; I feel I understand and gain insights into the big questions being asked. Thank You!

I always wanted to learn more physics, then they teach you at high school. But it is a dry an intimidating read alone, i'm so glad that you take your time to explain it! Keep up the good work!

Thank you again for a clear account of the Bohr model. You also made it clear to me that higher energy level electrons gain more potential energy than they lose kinetic energy. I never thought of higher energy electrons moving more slowly. Also that the radius of an orbital increases as the square of n suggests that higher orbitals should be more further apart.

You've been having a massive high-quality output this month. Keep up the great work!

Thanks Dr. Rod for making us watch this, very cool!

Your enthusiasm and passion for physics are clearly seen in these videos of yours. Thanks for reigniting the spark in an otherwise disengaged undergrad.

I believe I lucked out big time when your video on the ultraviolet catastrophe showed up on my homepage. Your presentations are very well -polished and have a great balance of not shying away from the math but also not getting too crazy with it. The history lessons remind me of Feynman's lectures - nobody else has really pulled off the "explain the history, stopping for a few minutes in each era to explain the minimal amount of information you'll need to understand the whole story, and make it captivating" sort of thing as far as I've been able to find. I'm hoping you keep it up!

The most clear, concise, and joined up explanation of this topic I have encountered. This is the first time I have understood this clearly, and I have a Physics degree.

This channel is excellent thank you! Cannot wait to see more!

a well-made explanation P.S: 13:16 I think you made a typo in the expression of the speed. We must replace pi by the planck constant

Your work has been a stepping stone forward in my life literally. Thank you++.What seemed intimidating to my thinking you have made it all logical and rational with background to the problems and their eventual path to solutions.Each piece in the work made sense and the explanations were timely. Just wish you had more videos.

Excellent video! I really appreciate your work. Can't wait for the next one!

I have been waiting for this clear explanation so long.

I love your videos SOOO MUCH! You are a great explainer, and tbh I've never before seen someone explain the struggles that past physicists had to go through for us to be able to stand on their shoulders. Your explanations of how certain equations were derived are some of the best I've ever seen, only topped by some derivations of purely mathematical stuff (for example 3blue1brown, but he's extremely hard to top lmao). I feel that your channel is gonna blow up soon, and I can't wait for your next videos!

This channel is amazing. The concepts are explained very well. Thanks for making these videos.

Oh please please make more videos like this! Would be amazing to see your explanation of photoelectric effect, with historical progression and context as you so very well put it in your other videos! or perhaps moving into quantum mechanics or optics would be amazing!

We need more videos like this. Please continue to. make! Big thanks for your efforts.

I am at a very local university in kenya but i am learning physics like as if i am in world class university because of this youtube channel. Thank you so much❤❤❤🇰🇪🇰🇪😘

The best explanation of the Bohr model I've ever seen, thank you

Splendid work as always! Hoping for a video on Heisenberg's Uncertainty principle soon

Absolutely fantastic content. For a layperson like myself, it's great to see the equations because it gives an real insight into the elegant beauty of the mathmatics behind the universe.

This is one of the most beautiful videos I've ever had the fortune to watch. Thank you.

That last minute lierally gave me chills! Wow I cant be more thankful to you, I thought I would never understand this concepts but now i can say I do. You are a true educator. Thanks again!

Bravo! I wish this were available 50 years ago when I took physical chemistry. I never quite grasped the interplay of the various early theories/models/equations and how Bohr synthesized them. I just subscribed. Count me in!

I honestly can't wait for the next one. I need more. Awesome work. Simplistic, but not simplifying. Marvellous.

Excellent video. Well done!

One of your best yet!!! Thank you.

Very, very helpful information for anyone going through college-level physics or even chemistry and biology in some cases. BRAVO. This is WONDERFUL information and it's so easy to understand. You have no idea how much I appreciate this content! THANK YOUUUU!!!!!

this is lowkey my favorite physics channel now

I really love your explanations! You don’t skip Important parts!

thank you - such an informative and entertaining at the same time upload. Much appreciated.

I’m impressed by the fact that when a question pops up in our mind by watching your vid, a bit of a second later the answer appears magically. It is as if you could predict our thoughts 💭😝. A very good and complete work that make us realize a part of the beauty behind those subject and the answers given by the passing time and those who follow it. 🖤📐

Best presentation on this subject on youtube so far

Brilliant video! I only got a brief intro in school, and this explains much more. Very interesting.

Very much love the content. The prediction of the Balmer series at the end is quite a stunner

I'm just becoming a fan of your simplistic explanation. You are doing a great job carry on.....wanna see more videos asap

Absolutely brilliant explanation! Thanks for the video :) Reminds me of my high school physics teacher, who used to explain things so neatly, I still remember it :)

This is perfection. I will be watching this many times. Thank you so much for making this

Brilliant for its clarity. So lucidly explained .

One thing I particularly like about these videos is they tie the reasonably-detailed algebra to experimental results. In this case, including the photograph of the spectral emission lines from hydrogen really brings home that all the maths leading up to that point is describing a real, testable phenomenon.

I found your ultraviolet catastrophe video excellent as well as this one, and look forward to continuing to learn from your videos. It always helps to see things presented in several slightly different ways. I've been trying to make beginner's headway in MCQuarrie and Simon's _Physical Chemistry: A Molecular Approach_ as well as White's _Introduction to Atomic Spectra_ , having completed Chapter 1 of the former and being in the middle of Chapter 1 (devoted to pre-Bohr spectroscopy) in the other. Having viewed your latest video a couple times casually when it came out, I dedicated yesterday to reviewing the relevant section of McQuarrie and Simon and then looking ahead to part of White's treatment of the Bohr atom, before devoting a couple hours last night and this morning to reviewing your video in detail, checking everything. I did notice a couple of errors in the expressions that appear. @13:25 the video has v = e^2/2πε_0n, whereas the actual expression that follows from the substitution shown should be v = e^2/2hε_0n. @15:05 the expression given to substitute for v^2, is the first such expression from earlier in the video, namely v^2 = e^2/4πε_0m_er, rather than the one actually needed for the substitution: v^2 = e^4/4ε_0^2h^2n^2. I must confess being driven in my desire to learn more by criticisms which have been leveled against the nuclear theory itself, as well as interest in a related non-standard theory. Those criticisms remain almost unknown due to the historical fact that Bohr's contribution (in part due to its striking initial success) has been the focus of subsequent modifications, in effect shielding the nuclear concept itself from critical scrutiny. A brief-but-cogent presentation of the reasons may be found here: philpapers.org/rec/LARJHM-3 To the point here, the conclusion that "the basic idea of energy levels and electron transitions would ultimately account for the emission spectra of all the known elements," is marred by the lack of discrimination between the sound pedigree of the energy levels concept itself, and the historical predisposition to describe them in terms of "electron transitions." To underscore this point, I'll close with an extended quotation from Larson's neglected classic _The Case Against the Nuclear Atom_ (1963). Would it not be healthy for physics if these criticisms were more widely appreciated? The most astounding feature of this whole situation is that after having thrown the only connection between the atomic energy levels and the nuclear atom to the wolves, and putting nothing in its place - even going to the extent of contending that nothing _can_ be put in its place - the physicists still insist on using the genuine successes of the theory of atomic energy levels as evidence of the validity of the nuclear theory to which it is no longer even distantly related. Furthermore, the whole jargon of spectroscopy is based on the features of the original theory that have now been repudiated. While Schrödinger tells us that there really are no electrons in orbit, Heisenberg says that there actually is no physical electron at all, only a “symbol,” and the whole Copenhagen school insists that we cannot conceive of the atom or any of its parts in anything but purely mathematical terms, the spectroscopists tell us just how many electrons there are in the atom and exactly how they are arranged in “shells,” etc., and proceed on this basis with the calculation of spectroscopic terms to an accuracy of eight or nine significant figures. “The terms result from definite configurations and motions of the outer electrons of the atom and are explained by a well-established theory of spectral structure,” [Citation omitted] says the National Bureau of Standards. This utterly ridiculous situation in which one group of physicists is defining specifically and in great detail the properties of entities which, according to an even more eminent group of physicists, have “no immediate and direct properties at all ” and do not even “exist objectively” is another example of the same confusion that was pointed out in connection with Moseley’s Law. Here again, as in the Moseley case, a name derived from currently popular theory has been arbitrarily attached to a particular physical phenomenon, and the scientific profession has fallen into the habit of accepting the connotations of that arbitrary nomenclature on the same basis as the observed properties of the phenomenon itself. The Bureau of Standards tells us, “…the atoms of a gas or vapor, when excited by radiation, absorb certain wavelengths corresponding to transitions of their outer electrons from lower energy levels to higher ones.” Here we have an assertion which contains three statements of totally different origin, all lumped together as if they were equally authoritative. The statement that the atoms absorb certain wavelengths when excited by radiation is a description of an observed fact. The statement that these particular wavelengths correspond to transitions from lower to higher energy levels is a theoretical conclusion which is strongly backed by evidence from experimental sources. The further statement that these energy levels are energies of electrons is pure hypothesis without the least vestige of experimental support. These levels are “Atomic Energy Levels” - the title of the Bureau of Standards publication from which the foregoing statement was taken - and that is all we know. Evidently some kind of units enter into the situation, but applying the name “electrons” to these units is pure guesswork. Similarly the same N.B.S. circular says, “Each chemical element can emit as many atomic spectra as it has electrons,” but what is actually known is that the number of different spectra is equal to the atomic number; the further conclusion that this represents a number of electrons is wholly gratuitous, and the use of the name “electron” serves no purpose that would not be fulfilled equally well by any other name. As pointed out earlier, any theory of atomic structure that could be given any serious consideration at all must necessarily make some provision for a quantity corresponding to the atomic number, and the name of this “something,” whatever it may be, can be substituted for “electron” in the language of spectroscopy without affecting spectroscopic theory in the least. The current contention that the successful application of the theory of energy levels to the study of spectra constitutes an argument in favor of the nuclear theory of the atom is therefore pure fantasy.

This is definitely the best new science series on youtube!

Dude, your videos are awesome! You made me understand with them some concepts i was struggling for quite some time. Please, make more videos! And I totally agree with The One: you have the same gift to expain hard stuff as the guys over 3B1B have. Thanks a lot!

Just mind bunglingly dense accurate presentation. So beautifully put together. Absolutely a public service.

Love the channel! Keep up the good work man.

I always wanted to be a physicist.. did my masters too.. but couldn’t pursue it further. Your videos exactly explaining not only the results and the flashy headlines but also the mathematics of how to get there make me relive my love for physics. Thank you so much for making them. Please keep making them.

What an awesome video man. Sincerely thank you.

After 20+ years I finally understand how spectral analysis works. Thank you!

Love your series. The histories are fascinating.

Really nice presentation. Really enjoyed it. It was a nice refresher with some additional insights that make my understanding a little deeper.

Great video! Keep up the good work! I suspect, in a couple of month this channel is going to blow up. I'm going to subscribe now, before this becomes a major channel.

I watched this film and immediately subscribed to the channel. Brilliantly explained!

I love these reflections at the end of each video.

Excellent, explains things that Ive always wondered about.

Outstanding content and presentation. Please keep posting!

I gotta say Something, you are so awesome. Explaining physics so good and mit leaving out the math!

This was such a throwback to my school days, I absolutely loved it. Are you going to make a video on the cloud model as well?

Great presentation. Thanks for clearly explaining the Bohr model of the atom which is still very relevant and appropriate today.

Subscribed. Beautifully articulated and factually correct. Rare in a world dominated by disinformation. Bravo.

Excellent pronunciation, pace quick enough to remain stimulating, while not jumping or skipping. Graphics are simple and clear. Length of lesson per video appropriate. Worth repeated viewing. About the only suggestion I can imagine is a reference to some book with solved examples and homework assignment. I wish I had you as an undergraduate professor in EE.

I love how are you going smoothly into quantum mechanics

this is amazing stuff, keep it up man

This content is so easy to understand. Thank you!

Great work. Great subjects like this need great work and editing. Couldn't be any better. Thank you for your hard work, also without those physicist and scientists, we wouldn't be able to watch videos like this on small devices that fit in our palm.

Excellent! Very complete! Thanks a lot!

Thanks, I've read about Electron Volts for decades, now I understand them!

Really well explained and understandable. Better than some of the actual physics classes I've had.

Fantastic Job, outstanding quality.