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

“Nature uses only the longest threads to weave her patterns, so each small piece of her fabric reveals the organization of the entire tapestry.”

Richard Feynman libro The Character of Physical Law

Origine: The Character of Physical Law (1965), chapter 1, “The Law of Gravitation,” p. 34

“Why are the theories of physics so similar in their structure?”

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

QED: The Strange Theory of Light and Matter (1985)

“In general, we look for a new law by the following process: First we guess it. Then we – now don't laugh, that's really true. Then we compute the consequences of the guess to see what, if this is right, if this law that we guessed is right, to see what it would imply. And then we compare the computation results to nature, or we say compare to experiment or experience, compare it directly with observations to see if it works. If it disagrees with experiment, it's wrong. In that simple statement is the key to science. It doesn't make any difference how beautiful your guess is, it doesn't make any difference how smart you are, who made the guess, or what his name is. If it disagrees with experiment, it's wrong. That's all there is to it.”

Richard Feynman libro The Character of Physical Law

same passage in transcript: video http://www.youtube.com/watch?v=-2NnquxdWFk&t=16m46s
The Character of Physical Law (1965)
Variante: In general we look for a new law by the following process. First we guess it. Then we compute the consequences of the guess to see what would be implied if this law that we guessed is right. Then we compare the result of the computation to nature, with experiment or experience, compare it directly with observation, to see if it works. If it disagrees with experiment it is wrong. In that simple statement is the key to science. It does not make any difference how beautiful your guess is. It does not make any difference how smart you are, who made the guess, or what his name is – if it disagrees with experiment it is wrong. That is all there is to it.

“I think I can safely say that nobody understands quantum mechanics.”

Richard Feynman libro The Character of Physical Law

Variante: I think I can safely say that nobody understands quantum mechanics.
Origine: The Character of Physical Law (1965), chapter 6, “Probability and Uncertainty — the Quantum Mechanical View of Nature,” p. 129

“I hope … that you will find someday that, after all, it isn’t as horrible as it looks.”

volume III, "Feynman's Epilogue", p. 21-19
The Feynman Lectures on Physics (1964)

“Nature isn't classical, dammit, and if you want to make a simulation of nature, you'd better make it quantum mechanical, and by golly it's a wonderful problem, because it doesn't look so easy.”

" Simulating Physics with Computers http://www.cs.berkeley.edu/~christos/classics/Feynman.pdf", International Journal of Theoretical Physics, volume 21, 1982, p. 467-488, at p. 486 (final words)

“There are 1011 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.”

from a 1987 class, 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. xx.

“The fact that you are not sure means that it is possible that there is another way someday.”

Richard Feynman libro The Meaning of It All

lecture II: "The Uncertainty of Values"
The Meaning of It All (1999)

“Shut up and calculate!”

Probably a misattribution which instead originated with David Mermin; in "Could Feynman Have Said This?" http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_57/iss_5/10_1.shtml?bypassSSO=1, by N. David Mermin, in Physics Today (May 2004), p. 10, he notes that in an earlier Physics Today (April 1989), p. 9, he had written what appears to be the earliest occurrence of the phrase:
If I were forced to sum up in one sentence what the Copenhagen interpretation says to me, it would be "Shut up and calculate!"
Disputed and/or attributed

“Principles
You can't say A is made of B
or vice versa.
All mass is interaction.”

note (c. 1948), quoted in Genius: The Life and Science of Richard Feynman (1992) by James Gleick, p. 5 (repeated p. 283)

“Light is something like raindrops — each little lump of light is called a photon — and if the light is all one color, all the "raindrops" are the same.”

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

Origine: QED: The Strange Theory of Light and Matter (1985), p. 14

“I don't know anything, but I do know that everything is interesting if you go into it deeply enough.”

Richard Feynman libro The Pleasure of Finding Things Out

From Omni interview, "The Smartest Man in the World" (1979) p. 203
The Pleasure of Finding Things Out (1999)

“Nature's imagination far surpasses our own.”

Richard Feynman libro The Character of Physical Law

Origine: The Character of Physical Law (1965), chapter 7, “Seeking New Laws,” p. 162: video http://www.youtube.com/watch?v=-2NnquxdWFk&t=29m20s

“I don't know what's the matter with people: they don't learn by understanding; they learn by some other way — by rote or something. Their knowledge is so fragile!”

Part 1: "From Rockaway to MIT", "Who Stole the Door?", p. 36-37
Surely You're Joking, Mr. Feynman! (1985)

“There is one feature I notice that is generally missing in cargo cult science. … It's a kind of scientific integrity, a principle of scientific thought that corresponds to a kind of utter honesty — a kind of leaning over backwards. For example, if you're doing an experiment, you should report everything that you think might make it invalid — not only what you think is right about it; other causes that could possibly explain your results; and things you thought of that you've eliminated by some other experiment, and how they worked — to make sure the other fellow can tell they have been eliminated. Details that could throw doubt on your interpretation must be given, if you know them. You must do the best you can — if you know anything at all wrong, or possibly wrong — to explain it. If you make a theory, for example, and advertise it, or put it out, then you must also put down all the facts that disagree with it, as well as those that agree with it. There is also a more subtle problem. When you have put a lot of ideas together to make an elaborate theory, you want to make sure, when explaining what it fits, that those things it fits are not just the things that gave you the idea for the theory; but that the finished theory makes something else come out right, in addition. In summary, the idea is to try to give all of the information to help others to judge the value of your contribution; not just the information that leads to judgement in one particular direction or another.”

" Cargo Cult Science http://calteches.library.caltech.edu/51/2/CargoCult.htm", adapted from a 1974 Caltech commencement address; also published in Surely You're Joking, Mr. Feynman!, p. 341

“Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there.”

Richard Feynman libro The Character of Physical Law

Origine: The Character of Physical Law (1965), chapter 6, “Probability and Uncertainty — the Quantum Mechanical View of Nature,” p. 127-128

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