Richard Feynman citáty
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Richard Phillips Feynman byl americký fyzik, který patřil k největším fyzikům 20. století.

✵ 11. květen 1918 – 15. únor 1988   •   Další jména Richard Feynman Philips, Richard Phillips Feynman, Ричард Филлипс Фейнман
Richard Feynman foto
Richard Feynman: 206   citátů 190   lajků

Richard Feynman nejznámější citáty

„Fyzikální zákony platí i tam, kam jsme se ještě nedívali.“

Zdroj: [Grygar, Jiří, Jiří Grygar, Vesmír, jaký je: současná kosmologie (téměř) pro každého, 1, Mladá fronta, Praha, 1997, 217, Kolumbus, 135, 12, 80-204-0637-9]

Richard Feynman: Zamilované citáty

Richard Feynman citáty a výroky

„Nechtěl bych umírat dvakrát. Je to tak nudné.“

poslední slova

„Věda je hodně podobná sexu. Někdy z ní vzejde něco užitečného, ale to není ten jediný důvod, proč ji děláme.“

Zdroj: [Pincott, Jena, Mají muži radši blondýnky?: láska, sex a přitažlivost, Nicolle Knapová, Dobrovský s.r.o., Praha, 2017, 296, Knihy Omega, Úvod, 9, 978-80-7390-460-9]

„Ty knihy prostě nestály za nic. Byly špatné, byly odfláknuté. Snažily se být exaktní, ale používaly příkladů, které byly skoro správné, ale vždycky na nich byly nějaké mouchy. Definice nebyly přesné. Všechno bylo trochu mnohoznačné – autoři nebyli dost chytří na to, aby chápali, co „přesnost“ znamená. Jen ji předstírali. Vykládali něco, čemu nerozuměli a co bylo v dané chvíli dítěti úplně k ničemu.“

Psal to někdo, kdo pořádně nevěděl, o čem mluví, takže to bylo vždycky trochu špatně! A jak dobře učit podle knížek napsanými lidmi, kteří pořádně nerozumějí tomu, o čem mluví, to nedovedu pochopit. Nevím proč, ale ty knížky byly mizerné; MIZERNÉ PO VŠECH STRÁNKÁCH! Něco vypadalo na první pohled dobře, a pak mě z toho jímal děs. A takhle to vypadalo se všemi těmi knihami. Vykládaly o věcech, které byly neužitečné, zmatené a matoucí, mnohoznačné a částečně nesprávné.
Dílo, To nemyslíte vážně, pane Feynmane!

Richard Feynman: Citáty anglicky

“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 kniha The Character of Physical Law

Zdroj: 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 kniha 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 kniha 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)
Varianta: 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 kniha The Character of Physical Law

Varianta: I think I can safely say that nobody understands quantum mechanics.
Zdroj: 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 kniha 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 kniha QED: The Strange Theory of Light and Matter

Zdroj: 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 kniha 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 kniha The Character of Physical Law

Zdroj: 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 kniha The Character of Physical Law

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

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