Frasi di Richard Feynman
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Richard Phillips Feynman è stato un fisico e divulgatore scientifico statunitense, Premio Nobel per la fisica nel 1965 e noto per i suoi contributi alla meccanica quantistica. Partecipò durante la seconda guerra mondiale, con Enrico Fermi e altri, al progetto Manhattan in cui venne costruita la prima bomba atomica, sotto la guida di Robert Oppenheimer. Le sue innovazioni matematiche teoriche, come l'integrale sui cammini, furono fondamentali per elaborare diverse teorie di cosmologia quantistica, oltre che per l'elettrodinamica quantistica che gli valse il Nobel.



✵ 11. Maggio 1918 – 15. Febbraio 1988   •   Altri nomi Richard Feynman Philips, Richard Phillips Feynman, Ричард Филлипс Фейнман
Richard Feynman photo
Richard Feynman: 216   frasi 23   Mi piace

Richard Feynman frasi celebri

“Sono fatto così: voglio sempre capire.”

frase finale del capitolo Certo, Mr. Big!

“Penso di poter affermare che nessuno capisce la meccanica quantistica.”

citato in Tony Hey, Patrick Walters, "The New Quantum Universe", 2003

“Non sopporterei di morire due volte. È una cosa così noiosa.”

I'd hate to die twice. It's so boring.
Ultime parole pronunicate da Richard Feynman come riportato in James Gleick, Genius: The Life and Science of Richard Feynman, 1992.

“Il tempo è ciò che accade quando non accade nient'altro.”

vol. I-1, cap. 5-2, 1994, p. 5-2

Frasi sulla scienza di Richard Feynman

“Ho imparato allora di che sostanza era fatta la scienza: era la pazienza.”

Cos'è la scienza? https://www.linkedin.com/pulse/cosè-la-scienza-di-richard-feynman-francesco-vissani/?published=t

“Scienza è credere nell'ignoranza degli esperti.”

The Pleasure of Finding Things Out : The Best Short Works of Richard Feynman, curato da Jeffery Robbins, ISBN 0-14-029034-6, alle pagine 186-187. Basato sulla trascrizione di un'intervista del 1981

“Non è scienza sapere come passare da gradi celsius a gradi fahrenheit. È necessario, ma non è esattamente scienza.”

Cos'è la scienza? https://www.linkedin.com/pulse/cosè-la-scienza-di-richard-feynman-francesco-vissani/?published=t

Frasi su tempo di Richard Feynman

“Tra molto tempo – per esempio tra diecimila anni – non c'è dubbio che la scoperta delle equazioni di Maxwell sarà giudicato l'evento più significativo del XIX secolo. La guerra civile americana apparirà insignificante e provinciale se paragonata a questo importante evento scientifico della medesima decade.”

Origine: Le equazioni di Maxwell furono presentate alla Royal Society nel 1864; la guerra di secessione americana si combatté dal 12 aprile 1861 al 26 maggio 1865. Da Lectures on Physics, vol. II.

“Quello che non riesco a creare, non lo saprò mai capire.”

Origine: Frase sulla sua lavagna al tempo della sua morte nel 1988; così com'è riportata in L'universo in un guscio di noce di Stephen Hawking.

“Impara a risolvere tutti i problemi che sono stati risolti.”

Origine: Frase sulla sua lavagna al tempo della sua morte nel 1988.

Richard Feynman Frasi e Citazioni

“È importante tener presente che nella fisica odierna, noi non abbiano cognizione di ciò che l'energia è. Non abbiamo un modello che esprima l'energia come somma di termini definiti.”

vol. I parte I, traduzione di E. Clementel, S. Focardi e L. Monari, Inter European Editions, 1975, 4–1

“Per una tecnologia che abbia successo, la realtà deve avere la precedenza sulle pubbliche relazioni, perché la natura non può essere imbrogliata.”

Origine: Dall' appendice F http://history.nasa.gov/rogersrep/v2appf.htm, che contiene alcune considerazioni di Feynman, del rapporto http://history.nasa.gov/rogersrep/genindex.htm della Commissione Rogers sul disastro dello Space Shuttle Challenger, giugno 1986.

“[I fisici] hanno cioè capito che il punto essenziale non è se una teoria piaccia o non piaccia, ma se fornisca previsioni in accordo con gli esperimenti. […] Dal punto di vista del buon senso l'elettrodinamica quantistica descrive una Natura assurda. Tuttavia è in perfetto accordo con i dati sperimentali. Mi auguro quindi che riusciate ad accettare la Natura per quello che è: assurda.”

This conference was worse than a Rorschach test: There's a meaningless inkblot, and the others ask you what you think you see, but when you tell them, they start arguing with you!
Origine: Da QED. La strana teoria della luce e della materia, traduzione di F. Nicodemi, Adelphi, 1989.

“La matematica è linguaggio […] più logica.”

Origine: Da La legge Fisica.

Richard Feynman: Frasi in inglese

“I do feel strongly that this is nonsense! … So perhaps I could entertain future historians by saying I think all this superstring stuff is crazy and is in the wrong direction. I think all this superstring stuff is crazy and is in the wrong direction. … I don’t like it that they’re not calculating anything. … why are the masses of the various particles such as quarks what they are? All these numbers … have no explanations in these string theories – absolutely none! … I don’t like that they don’t check their ideas. I don’t like that for anything that disagrees with an experiment, they cook up an explanation—a fix-up to say, “Well, it might be true.” For example, the theory requires ten dimensions. Well, maybe there’s a way of wrapping up six of the dimensions. Yes, that’s all possible mathematically, but why not seven? When they write their equation, the equation should decide how many of these things get wrapped up, not the desire to agree with experiment. In other words, there’s no reason whatsoever in superstring theory that it isn’t eight out of the ten dimensions that get wrapped up and that the result is only two dimensions, which would be completely in disagreement with experience. So the fact that it might disagree with experience is very tenuous, it doesn’t produce anything.”

interview published in Superstrings: A Theory of Everything? (1988) edited by Paul C. W. Davies and Julian R. Brown, p. 193-194

“You know, the most amazing thing happened to me tonight. I was coming here, on the way to the lecture, and I came in through the parking lot. And you won't believe what happened. I saw a car with the license plate ARW 357. Can you imagine? Of all the millions of license plates in the state, what was the chance that I would see that particular one tonight? Amazing!”

from a public lecture, as quoted in David L. Goodstein, "Richard P. Feynman, Teacher," Physics Today, volume 42, number 2 (February 1989) p. 70-75, at p. 73
Republished in the "Special Preface" to Six Easy Pieces (1995), p. xxi.
Republished also in the "Special Preface" to the "definitive edition" of The Feynman Lectures on Physics, volume I, p. xiv.

“A person talks in such generalities that everyone can understand him and it's considered to be some deep philosophy. However, I would like to be very rather more special and I would like to be understood in an honest way, rather than in a vague way.”

Richard Feynman libro The Character of Physical Law

Origine: The Character of Physical Law (1965), chapter 1, “The Law of Gravitation,” p. 13: video http://www.youtube.com/watch?v=j3mhkYbznBk&t=7m53s

“My mother … had a wonderful sense of humor, and I learned from her that the highest forms of understanding we can achieve are laughter and human compassion.”

Richard Feynman libro What Do You Care What Other People Think?

"The Making of a Scientist," p. 19
What Do You Care What Other People Think? (1988)

“So far as we know, all the fundamental laws of physics, like Newton’s equations, are reversible.”

volume I; lecture 46, "Ratchet and Pawl"; section 46-5, "Order and entropy"; p. 46-8
The Feynman Lectures on Physics (1964)

“Energy is a very subtle concept. It is very, very difficult to get right.”

address " What is Science? http://www.fotuva.org/feynman/what_is_science.html", presented at the fifteenth annual meeting of the National Science Teachers Association, in New York City (1966), published in The Physics Teacher, volume 7, issue 6 (1969), p. 313-320

“I don't like honors. … I've already got the prize: the prize is the pleasure of finding the thing out, the kick in the discovery, the observation that other people use it. Those are the real things.”

Richard Feynman libro The Pleasure of Finding Things Out

Origine: No Ordinary Genius (1994), p. 82, from interview in "The Pleasure of Finding Things Out" (1981): video http://www.youtube.com/watch?v=NEwUwWh5Xs4&t=24m55s

“Since then I never pay attention to anything by "experts". I calculate everything myself.”

After having been led astray on neutron-proton coupling by reports of "beta-decay experts".
Part 5: "The World of One Physicist", "The 7 Percent Solution", p. 255
Surely You're Joking, Mr. Feynman! (1985)

“Do not read so much, look about you and think of what you see there.”

letter to Ashok Arora, 4 January 1967, published in Perfectly Reasonable Deviations from the Beaten Track (2005) p. 230

“The Quantum Universe has a quotation from me in every chapter — but it's a damn good book anyway.”

Review blurb for the first edition of The Quantum Universe http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521564573 (1987)

“Every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering that the same thing: light is made of particles.”

Richard Feynman libro QED: The Strange Theory of Light and Matter

Origine: QED: The Strange Theory of Light and Matter (1985), p. 15

“I took this stuff I got out of your [O-ring] seal and I put it in ice water, and I discovered that when you put some pressure on it for a while and then undo it it doesn't stretch back. It stays the same dimension. In other words, for a few seconds at least, and more seconds than that, there is no resilience in this particular material when it is at a temperature of 32 degrees. I believe that has some significance for our problem.”

statement at hearing by Rogers Commission, 11 February 1986, Report of the PRESIDENTIAL COMMISSION on the Space Shuttle Challenger Accident, volume 4, p. 680 http://history.nasa.gov/rogersrep/v4part4.htm#4; also quoted in Genius: The Life and Science of Richard Feynman (1992) by James Gleick, p. 423

“If we suppress all discussion, all criticism, proclaiming "This is the answer, my friends; man is saved!" we will doom humanity for a long time to the chains of authority, confined to the limits of our present imagination. It has been done so many times before.”

The Value of Science (1955)
Contesto: We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.
... It is our responsibility to leave the people of the future a free hand. In the impetuous youth of humanity, we can make grave errors that can stunt our growth for a long time. This we will do if we say we have the answers now, so young and ignorant as we are. If we suppress all discussion, all criticism, proclaiming "This is the answer, my friends; man is saved!" we will doom humanity for a long time to the chains of authority, confined to the limits of our present imagination. It has been done so many times before.
... It is our responsibility as scientists, knowing the great progress which comes from a satisfactory philosophy of ignorance, the great progress which is the fruit of freedom of thought, to proclaim the value of this freedom; to teach how doubt is not to be feared but welcomed and discussed; and to demand this freedom as our duty to all coming generations.

“While in Kyoto I tried to learn Japanese with a vengeance. I worked much harder at it, and got to a point where I could go around in taxis and do things. I took lessons from a Japanese man every day for an hour.
One day he was teaching me the word for "see." "All right," he said. "You want to say, 'May I see your garden?' What do you say?"
I made up a sentence with the word that I had just learned.
"No, no!" he said. "When you say to someone, 'Would you like to see my garden?' you use the first 'see.' But when you want to see someone else's garden, you must use another 'see,' which is more polite."
"Would you like to glance at my lousy garden?" is essentially what you're saying in the first case, but when you want to look at the other fella's garden, you have to say something like, "May I observe your gorgeous garden?" So there's two different words you have to use.
Then he gave me another one: "You go to a temple, and you want to look at the gardens…"
I made up a sentence, this time with the polite "see."
"No, no!" he said. "In the temple, the gardens are much more elegant. So you have to say something that would be equivalent to 'May I hang my eyes on your most exquisite gardens?"
Three or four different words for one idea, because when I'm doing it, it's miserable; when you're doing it, it's elegant.
I was learning Japanese mainly for technical things, so I decided to check if this same problem existed among the scientists.
At the institute the next day, I said to the guys in the office, "How would I say in Japanese, 'I solve the Dirac Equation'?"
They said such-and-so.
"OK. Now I want to say, 'Would you solve the Dirac Equation?'”

how do I say that?"
"Well, you have to use a different word for 'solve,' " they say.
"Why?" I protested. "When I solve it, I do the same damn thing as when you solve it!"
"Well, yes, but it's a different word — it's more polite."
I gave up. I decided that wasn't the language for me, and stopped learning Japanese.
Part 5: "The World of One Physicist", "Would <U>You</U> Solve the Dirac Equation?", p. 245-246
Surely You're Joking, Mr. Feynman! (1985)

“The electron is a theory we use; it is so useful in understanding the way nature works that we can almost call it real.”

Part 2: "The Princeton Years", "A Map of the Cat?", p. 70
Surely You're Joking, Mr. Feynman! (1985)

“The "paradox" is only a conflict between reality and your feeling of what reality "ought to be."”

volume III; lecture 18, "Angular Momentum"; section 18-3, "The annihilation of positronium"; p. 18-9
The Feynman Lectures on Physics (1964)

“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.”

volume I; lecture 1, "Atoms in Motion"; section 1-2, "Matter is made of atoms"; p. 1-3
The Feynman Lectures on Physics (1964)

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