Atoms and Light: The Interaction and Nature of Light and Matter
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- Опубліковано 6 тра 2024
- This is the fourth lecture series of my complete online introductory undergraduate college course. This video series was used at William Paterson University and CUNY Hunter in online classes as well as to supplement in-person course material. Notes and links are present in the videos at the start of each lecture.
0:00:00 - lecture 1: The Nature of Light, part 1
0:27:18 - lecture 2: The Nature of Light, part 2
0:51:05 - lecture 3: Stellar Brightness and Magnitudes
1:16:41 - lecture 4: Color and Temperature
2:00:38 - lecture 5: Kirchhoff's Laws of Spectroscopy
2:05:55 - lecture 6: Atoms, Elements and Isotopes
2:42:26 - lecture 7: The History of the Atom
3:03:31 - lecture 8: The Bohr Model of the Atom
In this lecture series, we start with a two-part discussion on the nature of light and a summary of its wave-like properties. I'll discuss what exactly a photon is, and how it makes up all the colors of the electromagnetic spectrum. Next, I'll define the terms "brightness" and "luminosity", which are central to astronomy measurement. I'll also define the magnitude system, both apparent and absolute. We won't shy away from equations anymore, as I also derive how Pogson saddled all the future of astronomy with a Log-base-10 humbug. In the next lecture, I chat about how we exactly define color in astronomy using broadband filters. I also detail how color relates to temperature, what temperature actually is, and how blackbody radiation manifests in everyday life and in stars. Next up, I talk about how light interacts with matter, using Kirchhoff's Laws. Following this, I discuss the current state of knowledge about atoms, elements and isotopes. I chat about the periodic table, atomic numbers, what an atom is, how big they are, how they interact. Also, you'll learn about radioactivity. Because this is not at all intuitive, it's worth an extended discussion about the origin of the atom from Democritus to Plato and Aristotle to Dalton to Thomson to Rutherford. I'll show you all of the ways our view of matter has evolved, both philosophically and as a result of experiment. Finally, we end with a beginning quantum mechanical discussion. The Bohr Model of the atom is the standard way that introductory astronomy textbooks seek to demonstrate the link between atomic spectra and Kirchhoff's Laws of spectroscopy. It's important to motivate it with the essentials of quantum mechanics. Here, we add in Einstein's and deBroglie's and Schroedinger's contributions, but we lean back towards the "Astro 101" understanding of the atom. - Наука та технологія
Hello! There's a new version of this video! Take a look here: ua-cam.com/play/PLyu4Fovbph6e0oPk9ch3q2II9a8BT8gfL.html
The remaster fixes the audio and a few embarrassing mis-speaks.
I'm so glad this man has taken the time to not gain just an understanding, but an intuition on the subject-hence why he's able to transmit his understanding so well.
I've been dabbling in physics for about 8 years and this is one of the best videos I've ever come across to really hit home electromagnetism in a deep and intuitive way. And this is clearly because you have a deep intuitive understand of the nature of reality and a wonderful passion, ability to convey it. unfortunately through science text books and some lectures what is actually happening in reality it get lost to abstraction! You have a gift for communication!
Thanks for the compliment. I’m really pleased with how these early videos turned out. They are key to understanding all of the processes in astrophysics, and are woefully under-understood.
Cant believe how seamlessly you can give this verbal dissertation , Kotos bro! Your others are just as good
Thanks. It's a lot of practice, and giving public talks, as well
These are the best videos for people who are truly interested in this subject
Thanks. I’ve worked hard to curate these.
utterly amazing!, the way you explain. i feel like im learning for the 1st time again, you keep me totally intrigued! subscribed! cant wait to watch your other uploads.
This is probably the best introduction to quantum mechanics I've seen, and I've seen a lot. It explains the what and the why in a very elegant way. More people need to see this!
Thanks for making this available for everyone. Your ability to place the theory in a physical context we can relate to is awesome.
My pleasure!
Nice lecture. Thanks!
An Educator confidently rocking a bow tie like that gives me confidence they are correct. ^.^
31:30 - Groovy! ^.^
I enjoy listening to these, thanks for making a great playlist. FYI (not super important to the topic, but) the solenoid doesn't go back and forth to turn the engine. The solenoid closes the circuit between battery and starter motor, so that the little switch in your steering column doesn't need to have hundreds of amps running through it. :)
Thank u...My trade off choice at uni was between social science or the hard sciences...This field is becoming very well known. Very well explained.
Awesome. 100% information.
Love the videos!!! Light has geometry, we have Huygens’ Principle of 1670, that says: “Every point on a wave front has the potential for a new spherical wave”. I have read that the electron is spherical and charge is equally spaced on the surface of a sphere. Even fire takes on a spherical shape in zero gravity!
WOW!!! im 17 minutes in and you have covered so much so competently.
Am i wrong to understand that Einstein was abstractly applying the dopler effect to light and then extrapolating? Without the speed of sound being short enough for us to perceive the dopler effect, would we have ever come to understand relativity?
His ideas from special relativity came from his train travels....
Thank you for your lecture,, very well done!
Hi, love your long videos - thank you for all the time and effort 😊
I find these long ones a bit too much for my puny brain!!!
Thankfully though, JK has broken this one into 'chapters' that seems to be a good fit for my finite (limited) intellect...
Thanx JK!!!
Thank you for the clear and sober lectures about fantastic subjects Mr.Kimball, i always learn from them and i greatly appreciate it being available like this to the curious mind.
Your lectures are really good!
I love this guy. He is one of the better science communicators on UA-cam. I’ve listened to some of his deeper-dive lectures that go 4, 5, even 6 hours in length and he makes it very fascinating. He’s just good at doing this. Cool guy, good way about him.
Could he sum this up quicker?
This is great. I have learnt so much!!
Thank you! --Very helpful explanations.
Are you taking a class?
@@JasonKendallAstronomer No, I just enjoy lectures having to do with physics and astronomy.
I REALLY like your style ! :)
great lecture!
solenoids run on direct current
I have covid
Yup, I’m aware of the mistake. This entire video was republished in a better form. Sorry to hear you have covid.
Realy I like this video so so much its interestyng
Very good lecture. Thank you sir
So nice of you
Thank you for these videos I’m super interested in this stuff stuff grade 8 lol I’m 47 and I still wonder on all these things and I really enjoy your teaching
Ok, I may not be a Collage professor (but my dad was)…Ok, I was into astronomy when I was ~12-13-14 years old,. My God father, uncle Ronnie bought me a telescope! And my older brother and parents bought me an even bigger telescope and books on astronomy! I think they were more concerned that I would notice woman!
45:25 enlightenment poetry!
When I boil water, are the moving protons creating electromagnetic field waves thus generating photons, i.e.light? What am I missing here?
not missing a thing.
@@JasonKendallAstronomer Where's the light? Can the light from boiling water be detected?
So when im watching something burn. Its energy is interacting with my electrons. Trapping that 'something' in me? Then i produce out energy back at that 'something'?
Gotta appreciate a scientist who can pull off a bow tie.
I fell asleep while watching fortnite and woke up to this. Only think i can say is amazing work.
How atoms reflect light ?
They actually absorb and re-emit the light. A smooth surface makes a coherent reflection because all the atoms and molecules are in a regular lattice which assures that this process is “the same” among all. To learn more look up Feynman’s lectures.
@@JasonKendallAstronomer thank you !
The horse-head-nebula actually looks more like a baboon climbing a tree. 0:26
49:45 now imagine you play the Mozart k 488, and so many C's are anyway missing because it is in A major, so even the little that you can hear is missing in this key. Sounds like the average state of ignorance in which many of us spend our lives...
Best place to get nerdy
Wave patterns can be analogized this way too:
Destructive interference as dissonance, constructive as harmony.
Just a little different take.
Bose active cancelation headphones would disagree on the dissonance. Not only do you need perfect pitch, you also need perfect phase to make them work.
Great!
Good presentation but too fast for me, no gaps to take in.
14:13 auto play woke me up. 😢
I never knew the MLB catcher was so interested in science.
Funny you should say that....
A long time ago, I got an email from one of his fans. I went along with it, and finally said "Thanks for all the support for me and the team. But this email is the one I use between my manager and I, so I'd appreciate it if you wouldn't give it out." She said "of course". Never had a problem.
I've also been stopped on the street for looking like Nathan Lane (when I was overweight) and Michael J. Fox (when I wore denim and vests.)
I don't turn on my computer. It's always on.
*1 sometimes it goes to sleep.
*2 sorry, just being a smartass.
nice video, is what I meant to say.
umri
Before I listen to this entire lecture which I will, am I not wrong in thinking that light could be the cause of the expansion of the universe since light touches all points of the universe, just like gravity does? If a photon has weight and can push things it makes sense to me, especially if something gets pushed so far out of gravity that it starts flying away
I wish you well on your studies of all 14 lecture modules. Come back to this comment after you’re done, and answer your own questions. The journey will be fun.
It looks like "de Broglie," but it's pronounced "de broy."
Thanks. I heard it wrong in my college days and it stuck.
“Yes it’s spelled Raymond Luxury Yacht, but it’s pronounced Throat-Warbler Mangrove”
@@JasonKendallAstronomer IS that a reference to Monty Python maybe ? 😁😁🤣🤣🤡🤡😁😁😁😁
Let’s hear it for de Broglie. 🎵
Lazar predicted element 115.
Can you talk any faster
I’ll try to work on that
@@JasonKendallAstronomer Please don't; we need time to think about what you say. Seriously. The complainant can boost the speed by adjusting the settings.