#feynman lectures

[weberina]

I wish I had stumbled upon Feynman's lectures in high school. It's weird how things that used to be a disconnected mess are all now falling into place. And he sounds crazy. Hyperexcited, bouncing-off-the-walls kind of crazy. And I'm only reading him not watching the videos.

Also I now can't stop thinking about jiggling corks in the water.

[scripta-elegans]

Richard P. Feynman: The Distinction of Past and Future

[ozzgin]

pls pls pleas please Please PLEase PLEASE *PLEASE*!!!!!!!!!!! 🥺🥺😘😏😋🥺💞🙏😞😭🥜🥜🥜🫣🫡 Yan! Teacher x reader? It can be uncannon and not connected to the rest of the story but PLEASE..

I gen/ have a lady boner for this elegant yet horn dog of a man. I just *KNOW* he'd treat me better than any of the young and foolish classmates in that school.

Yan!teacher : (sweating buckets, trying to hold back while also being taken aback)

Me, who broke into his house to get a smooch: Uh. You come here often?

Yan!teacher : This.. is my house.

Me : And this is the house of my dreams, Baba grill. I want you to bend me over tonight, tell I'm good, then take me out to dinner, marry me the next morning, buy a quaint cottage in the country side, make me pregnant, adopt a dog who we will name Bartholomew Chungus Roofus Goofy Achilles Pedro Pascal, open a bakery, then I go into labour and give birth, afterwards we'll renew our vows and go on a grand vacation at Italy where you'll feed me gelato and panacotta as I rock our triplets to sleep and play with the dog

Yan!teacher : I'd love to bu- wait what?

Me : 👁️🫦👁️

I'll tell you what, I've always wanted to write a Yandere Professor. He'd be a theoretical physicist, teaching standard courses at the local university. Terribly passionate about his research, sometimes to awkward extents. He's surprisingly flirty and cheeky for someone of his age and status, but he's quick to remind you what kind of nerd you're dealing with.

The only reason I've been postponing it is because I wanted to dust off my own knowledge, so it can be as authentic as possible.

[mattidwan]

if an apple is magnified to the size of the earth, then the atoms in the apple are approximately the size of the original apple

[missanthropicprinciple]

I have to admit that I’ve been depressed since I found out that Richard Feynman choked his second wife.

[courtingwonder]

Richard Feynman - Elementary Particles And The Laws Of Physics (1986) (Duration: 13 Min) --- youtube.com/watch?v=cKzzG5DS6V8

[okie-studies]

Was in a slump today (dear brain went on its monthly

hibernation), didn't do much except

10 pages of trigonometry

A chapter of electrostatics

Some morse code practice (does it even count?)

40 pages of the brain book and

Walks (tried listening to feynman lectures while at it, one and a half lecture down)

Ps: check out linear algebra videos on 3b1b they're ✨

[gaminedyke]

hi guys! does anyone have any physics book recommendations? (can be biography or textbook, but nonfiction only)

[studentbyday]

Quantum Behavior Pt. 3:

Subtleties of P1 + P2 ≠ P12, First Principles of Quantum Mechanics, & Heisenberg's Uncertainty Principle

Previous notes: Quantum Behavior Pt. 1 // Quantum Behavior Pt. 2

Since the number of electrons that arrive at a particular point ≠ the number of electrons that arrive through hole 1 + the number of electrons that arrive through hole 2, we logically conclude that it's NOT true that electrons go through EITHER hole 1 or hole 2. But is it really not true? This is the aspect of electron behavior for which we said a conceptual explanation is elusive. So let's try to test this conclusion with another experiment:

Electric charges scatter light, which we can use to test whether electrons do go through either hole 1 or hole 2, not both at the same time. If an electron passed through hole 2 (see diagram), it would cause a flash of light near hole 2 (point A on the diagram). Similarly, if an electron passed through hole 1, it would cause a flash of light near hole 1.

So whenever we hear a click, we can tally the flashes at each hole and get the probability of an electron arriving at the detector via hole 1 (P'1) and the probability of an electron arriving at the detector via hole 2 (P'2).

What we see is that no matter where we put the detector, every time we hear a "click" from the electron detector, we also see a flash of light either near hole 1 or near hole 2, never both at once. This means electrons DO arrive either through hole 1 OR hole 2. If this is true, then why does P12 ≠ P1 + P2?

This experiment is problematic because light is an electric field perpendicular to a magnetic field (hence light is a form of electromagnetic radiation) and its electric field exerts a force on charges. Trying to watch the electrons (i.e. using light) changes the electrons' motions such that the probability of an electron arriving at the detector through hole 1 or hole 2 is changed so P'12 = P'1 + P'2. The probability of an electron arriving at the detector through hole 1 or hole 2 (P'12) shows no interference. When we turn off the light, we get the original idea that P12 ≠ P1 + P2 and that P12 shows interference.

If we were to dim the light source, i.e. decrease its intensity, all we discover is that light are also particle-waves like electrons. Decreasing light's intensity means that the rate at which particles of light aka photons are emitted decreases. This means that sometimes we hear a click from the detector (electron arrived) and there is no flash of light - there was no photon emitted at the moment the electron passed by. The size of the photons doesn't change when you decrease the light's intensity, so when you DO see light, the flashes are always the same size as when the light was brighter.

If we were to do this experiment with a dimmed light, these are the results we'd get:

"When we do not see the electron, no photon disturbs it, and when we do see it, a photon has disturbed it. There is always the same amount of disturbance because the light photons all produce the same-sized effects and the effect of the photons being scattered is enough to smear out any interference effect."

If, the greater the photon's momentum, the more the electron is disturbed, perhaps we should lower the frequency of light if we don't want to disturb the electrons as much.

This would work if we could tell where the electrons come from at a low enough frequency. But we can't. I don't get why the wave nature of light creates this limit but I'm pasting the explanation here so I can review it later:

You remember that when we discussed the microscope we pointed out that, due to the wave nature of the light, there is a limitation on how close two spots can be and still be seen as two separate spots. This distance is of the order of the wavelength of light. So now, when we make the wavelength longer than the distance between our holes, we see a big fuzzy flash when the light is scattered by the electrons. We can no longer tell which hole the electron went through! We just know it went somewhere! And it is just with light of this color that we find that the jolts given to the electron are small enough so that P′12 begins to look like P12—that we begin to get some interference effect. And it is only for wavelengths much longer than the separation of the two holes (when we have no chance at all of telling where the electron went) that the disturbance due to the light gets sufficiently small that we again get the curve P12 

This demonstrates Heisenberg's uncertainty principle which states that there's a limit to how accurately we can [experimentally] predict from initial conditions the values for certain pairs of physical properties of a particle (e.g. particle position and momentum). "It is impossible to design an apparatus to determine which hole the electron passes through [electron position], that will not at the same time disturb the electrons enough to destroy the interference pattern [due to photon momentum changing the electron's motion]."

Tbh I didn't really get all the details of the later parts of the chapter (especially the math). Maybe I will if I come back to this someday. Anyway, all in all, the book's a good read.

[one-time-i-dreamt]

It was the night before an electrodynamics exam. I was visited by Richard Feynman and Leonard Susskind. I presumed they'd come to help me revise, but Susskind launched into a lecture about string theory, while Feynman kept trying to give me dating advice.

[uhardite]

7 study techniques for perfect retention

୨୧ spaced repetition:

after you learn a concept, review it after 1 day, then repeat after a gap of 2 days, 4 days, 8 days, 16 days and so on

୨୧ use the 80/20 rule:

80% of the results come from 20% of the inputs. hence before learning something, take time to identify the most important 20% (to learn more about this, check this post)

୨୧ the feynman method:

-> identify a topic -> try to explain it to a 5-year old -> study to fill gaps in your knowledge -> organize what you know and review

୨୧ study twice at 2x speed:

a study showed that students who watched a lecture at 2x speed, and again watched it (at 2x speed) a week later scored higher than the students who watched the lecture only once at normal speed

୨୧ learn from multiple sources:

-> stimulate different parts of your brain by learning the concept from books, videos, audio, etc -> refer the retention pyramid given in the end of this post

୨୧ handwriting > typing :

research shows that we retain information better when we use pen and paper instead of keyboard, but this is up to you and what suits you

୨୧ test yourself:

-> puts information in your brain -> recalls information in your brain -> helps identify weak points

by @//growwithcolby on ig

[webweabings]

THE STARS KNOW EVERYTHING

“Dilbert”, by Scott Adam; // “Manfred”, by Lord George Gordon Byron; // Poem by Traci Brown; // “Delphi Complete Work of Ralph Waldo Emerson”, by Ralph Waldo Emerson; // “Kaddish and Other Poems: Poem Rocket”, by Allen Ginsberg; // “Pleasures, Objects and Advantages of Literature”, by Robert Aris Willmott; // “The Garden of Epicurus”, by Anatole France; // Poem by Chandrasekar Koneru; // Quote by Les Brown; // Quote by Vincent van Gogh; // “Love and Space Dust”, by David Jones; // Quote by Virgil; // Unknown; // “The Feynman Lectures on Physics: Astronomy”, Vol. 1, 3-6 by Richard P. Feynman; // Quote by Henry van Dyke; // “Twilight Hours: A legacy of verse”, by Sarah Williams; // Unknow; // “Poems, by Currer, Ellis and Acton”, by Emily Brontë

[14dyh]

Nerdy Love | H.Z.

Pairing: Hange Zoë x reader Summary: Hange with a nerdy lover headcanons! (Science Edition: Chemistry, Botany, Physics, and Astronomy) A/N: the physics part was pretty self-indulgent, i just want to share the world of science with Hange :")

Hange with a nerdy lover...

Chemistry

if you're a chemistry nerd,

Hange would be overjoyed at having someone who shares their favorite subject with them

when you first met, they sat beside you in the lab and went on talking about chemistry and such

enthused by your knowledge, Hange will begin to search even deeper chemistry knowledge so they can keep longer conversations with you

periodic table of elements jokes (Hange will, I just know)

will probably bring their own microscope kit when there is no schedule for lab

will look at you like you hung the stars even when you're talking about highly toxic chemicals

looks at you with heart eyes even if your hair is mostly disheveled from working for hours in certain chemicals

thinks you look adorable in safety goggles

shares a matching chemistry-themed coffee mug with you that looks like a beaker

one time, you had a lab accident but Hange was there, and unsurprisingly, they are efficient at first aid. their presence was a huge comfort, and they made sure you wouldn't panic the entire time

making sure you have appropriate experiment equipment is their love language

Botany

if you're a botany nerd,

Hange will try to impress you by identifying leaves around the school garden

will give you a leaf with a unique shape they found

will also pick the best tree bark piece for you (the one that doesn't have a brittle texture, it's sturdy enough that you can turn it into a pendant)

will show you a collection of dried leaves they tucked on their enormous books as a bookmark

they adore textured plants so they would be so happy to find some in your garden

loves the vibrant flowers that grow in your garden

they would likely want to surprise you by growing a plant and giving it to you on valentine's day

lotsssss of plant puns

knows how you water each of your plants because they always observe you when doing it

loves the way you observe each plant, knowing well if it grew new leaves, flowers, or fruits

they take you to garden dates <3

Physics

if you're a physics nerd,

Hange loves interactive toys that use physics. they would probably share lots of that with you

both of you would fall asleep together listening to Feynman lectures (it was relaxing, trust me)

this post:

you could talk to them about the most obscure physics theories and they'll know what you're talking about (which makes your heart leap with joy and end up kissing them on the cheek several times)

they're genuinely interested even if you're talking about steam engine history for hours

you get pissed off when the laws of motion are discussed in such a shallow, abecedarian way in high school and Hange adores your pouting face.

loves helping you out with calculus problems in physics

they became invested in chemical physics because of you

exchanges science books with annotations for you at least every week

loves silly, theoretical questions with you

listens attentively to you even if you're describing light and optics during a school disco party

adores you when you discuss torque mechanics using a basketball during PE

even when walking past a river, you can't help but tell them the amazing hydrodynamics of the flowing water. Hange loves seeing the sparkle in your eyes whenever you describe the beauty of the world using physics

volunteers to participate in your mini physics experiments

they are very resourceful so they mostly help you with applying physics to real-life devices/inventions

their eyes lit up when they see both of your inventions materialize but they're more happy to see how delighted you are

(i still remember how happy they were when they successfully developed the "Executioner from Hell")

it's canon that Hange has the best intuition and analyzing skills in AOT so you get along very well since those qualities abide by the principles of physics

these headcanons are mostly modern au bc AOT is depressing but I bet you and Hange would most likely bond over developing or designing weapons or devices for the Survey Corps

(personally, I believe that they would most likely be a physics teacher in modern au since most of their inventions use physics)

This teacher reminds me of Hange so much

Astronomy

if you're an astronomy nerd,

Hange still teases you about the day you met because your conversation starter is what is your favorite star

they adore you and even tell you their favorite constellation

probably gave you one of those glowing circular glass lamps with the solar system inside for valentine's day

romantic stargazing :D

and planetarium dates!

they love hanging out in your room because you can talk for hours while gazing at glow-in-the-dark astronomy stickers on your ceiling

you have matching astronomical sphere ball necklaces (probably have both of your initials too)

you share an astronomy playlist (could just be music or podcasts)

(self-indulgent but I think they would enjoy StarTalk and SciShow Space marathon with you)

they have this cute habit of giving you star-shaped food or any object that happens to be star-shaped ("this reminded me of you :D" they'll say)

your space movies watchlist will be playing on movie nights, Hange will also share a sci-fi movie list with you in return

they'll surprise you with intriguing astronomy questions and your heart leaps because you know they've been paying attention whenever you talk about your interests

-

I'm pretty sure Hange would also enjoy watching Rick and Morty, Futurama, The Big Bang Theory, Fullmetal Alchemist and such with you, especially in their downtime. Aside from science documentaries, that is.

[blackswaneuroparedux]

I... a universe of atoms, an atom in the universe.

- Richard Feyneman

Richard Feynman (1918-1988) was an American theoretical physicist who received the Nobel Prize in 1965. Robert Wilson recruited the brilliant young Feynman, only 24 at the time, for the Manhattan Project as a junior physicist soon after completing his Ph.D.  At Los Alamos, Feynman was assigned to the theoretical division of Hans Bethe, and soon became a group leader. Feynman was briefly transferred to the Oak Ridge facility, where he aided engineers in calculating safety procedures for material storage so that inadvertent criticality accidents could be avoided. He was well known for playfully challenging the security at Los Alamos, and was present for the Trinity test in 1945, viewing the explosion through his truck windshield.

After the Manhattan Project, Feynman regretted not reconsidering his work after Germany was defeated in World War II, although he continued to feel that the threat of a nuclear-armed Nazi Germany was enough to justify his initial participation. He turned down an offer from the Institute for Advanced Study and joined Hans Bethe at Cornell from 1945 to 1950, where he taught theoretical physics. Feynman left to join the faculty at Caltech in 1950. There he conducted his groundbreaking research in areas of quantum electrodynamics and superfluidity.

Feynman won his 1965 Nobel Prize in Physics for his work in quantum electrodynamics, a formula well known for its accurate predictions, which combines his path integral formulation and his Feynman diagrams. Additionally, he worked in the fields of the physics of superfluidity and quantum gravity, and developed a model of weak decay. However he caused great controversy when shortly after winning the prize in 1965, he seemingly rejected it. Feynman increasingly felt unease at the award turning the scientists into an institution.

It was no strange thing for Feynman to offer an opinion contrary to authority. Often called a buffoon and a magician, Feynman was scolded by the scientific world for his pursuit of things outside science, like art and music. A series of televised lecturers for the public secured his place in the households of millions in the US and the rest of the world. It was here that his excitement and passion for science trickled into the popular psyche and admitted countless young people into the world of science. He loved science and its limitless possibilities of discovery; it is no surprise, then, that he viewed his Nobel Prize with indifference.

[sunscreenstudies]

Study Hacks

It’s time to revolutionize the way you approach your studies! These simple but effective techniques will help you study smarter, retain information better, and maximize your productivity!

The Power of Active Recall: Instead of passively re-reading your notes, engage in active recall. Close your textbook or notes and try to recall the information from memory. This technique enhances your memory retrieval and strengthens your understanding of the material.

The Feynman Technique: Teach what you've learned to someone else, even if it's an imaginary student. This technique forces you to simplify complex concepts and explain them in a way that others can understand. It helps solidify your understanding and identify areas where you need further clarification.

Spaced Repetition Technique: Space out your study sessions over time to optimize memory retention. Review the material at regular intervals, focusing more on challenging topics. This technique helps reinforce the information in your long-term memory.

Chunking Method: Break down complex information into smaller, manageable "chunks." Group related concepts together and create associations between them. This approach makes it easier to remember and recall information during exams or assignments.

Visualize Concepts: Utilize visual aids like mind maps, flowcharts, and diagrams to represent complex ideas or relationships between topics. Visualizing information enhances your understanding and makes it easier to recall during exams.

Utilize Technology Tools: Take advantage of technology to enhance your studying experience. Use productivity apps like Evernote, Notion, or OneNote to organize your notes and create digital flashcards. Online platforms like Quizlet or Anki can help you create interactive quizzes for efficient review.

The Pomodoro Technique: Break your study sessions into focused intervals of 25 minutes, followed by a short 5-minute break. After completing four cycles, take a more extended break. This method helps combat fatigue, maintains concentration, and improves time management.

Use Multisensory Learning: Engage multiple senses while studying to enhance memory retention. Read out loud, draw diagrams, create mnemonic devices, or even incorporate scents or music to associate with specific topics. The more senses you involve, the stronger the memory associations become.

Efficient Note-Taking: Optimize your note-taking by using abbreviations, symbols, and bullet points. Highlight key concepts and important information. Summarize lectures or readings in your own words to reinforce understanding and condense information.

Take Breaks and Rest: Remember to prioritize self-care and take regular breaks. Allow your mind to rest and rejuvenate. Engaging in physical activities, practicing mindfulness, or pursuing hobbies during breaks helps you return to studying with a refreshed mindset.

Remember, these study hacks are meant to be adapted and personalized to suit your learning style and preferences. Experiment with different techniques and find what works best for you. Combine them, modify them, and create your own unique study strategies!

[incorrect-oppenheimer]

Compiling a list of books everyone knows about. It's long so under the cut...

Novelty Books: Area 51 by Nick Redfern Los Alamos by Joseph Kanon Unleashing Oppenheimer by Jada Yuan Oppenheimer: The Complete Screenplay by Christopher Nolan Copenhagen by Michael Frayn The Oppenheimer Alternative by Robert J. Sawyer The Manhattan Projects by Jonathan Hickman

Books by others: The Advisors: Oppenheimer, Teller, and the Superbomb by Herbert F. York The Real Dr. Strangelove by Peter Goodchild The Tragedy of Edward Teller by István Hargittai Judging Teller by István Hargittai Martians of Science by István Hargittai Wisdom of the Martians of Science by István Hargittai Edward Teller: A Giant of the Golden Age of Physics by Stanley A. Blumberg and Louis G. Panos Energy and Conflict: The Life and Times of Edward Teller by Stanley A. Blumberg and Gwinn Owens Brotherhood of the Bomb by Gregg Herken The Making of the Atomic Bomb by Richard Rhodes Atomic Spy by Nancy Thorndike Greenspan The Spy Who Changed The World by Mike Rossiter Physics and Philosophy by Werner Heisenberg The Meaning of Relativity by Albert Einstein Now It Can Be Told by Leslie Groves (With introduction by Edward Teller, who tried to be nice.) Oppenheimer: The Story of a Friendship by Haakon Chevalier The Man Who Would Be God by Haakon Chevalier (This is weird.) American Prometheus by Kai Bird and Martin J. Sherwin Feynman by Ottaviani and Myrick Fallout by Ottaviani Trinity by Jonathan Fetter-Vorm Easton Press: Day of Trinity by Lansing Lamont The Man From The Future by Ananyo Bhattacharya The MANIAC by Benjamín Labatut Big Science by Michael Hiltzik Forks In The Road: A Life In Physics by Stanley Deser A Sense of the Mysterious: Science And The Human Spirit by Alan Lightman Pandora’s Keepers by Brian VanDeMark J Robert Oppenheimer by Abraham Pais An American Genius by Herbert Childs Lawrence and Oppenheimer by Nuel Pharr Davis The General And The Genius by James Kunetka J. Robert Oppenheimer And The American Century by David C. Cassidy Atoms In The Family by Laura Fermi Genius In The Shadows by William Lanouette Beyond Uncertainty by David C. Cassidy An Atomic Love Story by Patricia Klaus and Shriley Streshinsky 109 East Palace by Jennet Conant The Strangest Man by Graham Farmelo The Night of the Physicists by Richard von Schirach Oppenheimer and the American Century by David C. Cassidy Alvarez: Adventures of a Physicist by Luis W. Alvarez Oppenheimer by Isidor Isaac Rabi and more. Bomb by Steve Sheinkin Fallout by Steve Sheinkin Surely You’re Joking Mister Feynman by Richard Feynman The Feynman Lectures by Richard Feynman When We Cease To Understand The World by Benjamín Labatut Enrico Fermi: His Work And Legacy by Enrico Fermi Suspended In Language by Ottaviani

Oppenheimer: The Open Mind Atom and Void In The Matter of J. Robert Oppenheimer (By everyone else.) These are the transcripts of the trials. Robert Oppenheimer Letters and Recollections edited by Alice Kimball Smith and Charles Weiner Science and the Common Understanding City of the End of Things by Northrop Frye, J. Robert Oppenheimer, and Edward Togo Salmon Uncommon Sense Lectures On Electrodynamics

More added on reblog.