Frases de Richard Feynman

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Richard Feynman

Data de nascimento: 11. Maio 1918
Data de falecimento: 15. Fevereiro 1988
Outros nomes: Richard Feynman Philips, Richard Phillips Feynman, Ричард Филлипс Фейнман

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Richard Philips Feynman foi um físico norte-americano do século XX, um dos pioneiros da eletrodinâmica quântica, e Nobel de Física de 1965. É irmão mais velho da astrofísica Joan Feynman.

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Citações Richard Feynman

„Os poetas reclamam que a ciência retira a beleza das estrelas. Mas eu posso vê-las de noite no deserto, e senti-las. Vejo menos ou mais?“

—  Richard Feynman, livro The Feynman Lectures on Physics
Poets say science takes away from the beauty of the stars — mere globs of gas atoms. Nothing is "mere". I too can see the stars on a desert night, and feel them. But do I see less or more? The Feynman Lectures on Physics: Mainly Mechanics, Radiation, and Heat‎, de Richard Phillips Feynman, Robert B. Leighton, Matthew L. Sands - Publicado por Addison-Wesley, 1963

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„A filosofia da ciência é tão útil para o cientista quanto a ornitologia para os pássaros“

—  Richard Feynman
Richard Feynman, conforme relatado por Singh, Simon - Big Bang - Editora Record - Rio de Janeiro / São Paulo - 2006. ISBN: 85-01-07213-3 (pág. 459)

„Posso dizer seguramente que ninguém entende a física quântica.“

—  Richard Feynman, livro The Character of Physical Law
I think I can safely say that nobody understands quantum mechanics The Character of Physical Law (1965) Ch. 6; MIT Press, 1967

„A Física está para a Matemática como o sexo está para a masturbação.“

—  Richard Feynman
Physics is to mathematics what sex is to masturbation Richard Feynman citado em "Physically speaking: a dictionary of quotations on physics and astronomy"‎ - Página 215, Carl C. Gaither, Alma E. Cavazos-Gaither - CRC Press, 1997, ISBN 0750304707, 9780750304702 - 492 páginas

„Se você acha que entendeu alguma coisa sobre mecânica quântica, então é porque você não entendeu nada.“

—  Richard Feynman
Atribuídas, If you think you understand quantum mechanics, you don't understand quantum mechanics. citado em "Armageddon now: the end of the world A to Z‎" - Página 337, Jim Willis, Barbara Willis - Visible Ink Press, 2005, ISBN 0780809238, 9780780809239 - 450 páginas

„A ideia é fornecer todas as informações, para que os outros possam julgar o valor de sua contribuição, e não apenas as informações que dirijam o julgamento para uma direção específica.“

—  Richard Feynman
Atribuídas, Sobre escolhas seletivas na investigação científica. como citado por Ben Goldacre em Ciência picareta; tradução de Renato Rezende, Rio de Janeiro: Civilização Brasileira, 2015, versão kindle, posição 1879.

„I learned very early the difference between knowing the name of something and knowing something.“

—  Richard Feynman, livro What Do You Care What Other People Think?
What Do You Care What Other People Think? (1988), Context: You can know the name of that bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird. You'll only know about humans in different places, and what they call the bird. … I learned very early the difference between knowing the name of something and knowing something. "The Making of a Scientist," p. 14 <!-- Feynman used variants of this bird story repeatedly: (1) "What is Science?", 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. (2) Interview for the BBC TV Horizon program "The Pleasure of Finding Things Out" (1981), published in Christopher Sykes, No Ordinary Genius: The Illustrated Richard Feynman (1994), p. 27. -->

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„Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question — to doubt — to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.“

—  Richard Feynman
The Value of Science (1955), Context: The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty — some most unsure, some nearly sure, but none absolutely certain. Now, we scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know. But I don’t know whether everyone realizes this is true. Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question — to doubt — to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.

„The real problem in speech is not precise language. The problem is clear language.“

—  Richard Feynman
Context: The real problem in speech is not precise language. The problem is clear language. The desire is to have the idea clearly communicated to the other person. It is only necessary to be precise when there is some doubt as to the meaning of a phrase, and then the precision should be put in the place where the doubt exists. It is really quite impossible to say anything with absolute precision, unless that thing is so abstracted from the real world as to not represent any real thing.Pure mathematics is just such an abstraction from the real world, and pure mathematics does have a special precise language for dealing with its own special and technical subjects. But this precise language is not precise in any sense if you deal with real objects of the world, and it is only pedantic and quite confusing to use it unless there are some special subtleties which have to be carefully distinguished. " New Textbooks for the "New" Mathematics http://calteches.library.caltech.edu/2362/1/feynman.pdf", Engineering and Science volume 28, number 6 (March 1965) p. 9-15 at p. 14 Paraphrased as "Precise language is not the problem. Clear language is the problem."

„It is really quite impossible to say anything with absolute precision, unless that thing is so abstracted from the real world as to not represent any real thing.“

—  Richard Feynman
Context: The real problem in speech is not precise language. The problem is clear language. The desire is to have the idea clearly communicated to the other person. It is only necessary to be precise when there is some doubt as to the meaning of a phrase, and then the precision should be put in the place where the doubt exists. It is really quite impossible to say anything with absolute precision, unless that thing is so abstracted from the real world as to not represent any real thing.Pure mathematics is just such an abstraction from the real world, and pure mathematics does have a special precise language for dealing with its own special and technical subjects. But this precise language is not precise in any sense if you deal with real objects of the world, and it is only pedantic and quite confusing to use it unless there are some special subtleties which have to be carefully distinguished. " New Textbooks for the "New" Mathematics http://calteches.library.caltech.edu/2362/1/feynman.pdf", Engineering and Science volume 28, number 6 (March 1965) p. 9-15 at p. 14 Paraphrased as "Precise language is not the problem. Clear language is the problem."

„We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation.“

—  Richard Feynman, livro The Character of Physical Law
The Character of Physical Law (1965), Context: Now we have a problem. We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation. This doesn't happen in mathematics, that the theorems come out in places where they're not supposed to be! chapter 2, “ The Relation of Mathematics to Physics http://www.youtube.com/watch?v=M9ZYEb0Vf8U” referring to the law of conservation of angular momentum

„They just went right on running rats in the same old way, and paid no attention to the great discoveries of Mr. Young, and his papers are not referred to, because he didn't discover anything about rats. In fact, he discovered all the things you have to do to discover something about rats. But not paying attention to experiments like that is a characteristic of cargo cult science.“

—  Richard Feynman
Context: All experiments in psychology are not of this [cargo cult] type, however. For example there have been many experiments running rats through all kinds of mazes, and so on — with little clear result. But in 1937 a man named Young did a very interesting one. He had a long corridor with doors all along one side where the rats came in, and doors along the other side where the food was. He wanted to see if he could train rats to go to the third door down from wherever he started them off. No. The rats went immediately to the door where the food had been the time before.The question was, how did the rats know, because the corridor was so beautifully built and so uniform, that this was the same door as before? Obviously there was something about the door that was different from the other doors. So he painted the doors very carefully, arranging the textures on the faces of the doors exactly the same. Still the rats could tell. Then he thought maybe they were smelling the food, so he used chemicals to change the smell after each run. Still the rats could tell. Then he realized the rats might be able to tell by seeing the lights and the arrangement in the laboratory like any commonsense person. So he covered the corridor, and still the rats could tell.He finally found that they could tell by the way the floor sounded when they ran over it. And he could only fix that by putting his corridor in sand. So he covered one after another of all possible clues and finally was able to fool the rats so that they had to learn to go to the third door. If he relaxed any of his conditions, the rats could tell.Now, from a scientific standpoint, that is an A-number-one experiment. That is the experiment that makes rat-running experiments sensible, because it uncovers the clues that the rat is really using — not what you think it's using. And that is the experiment that tells exactly what conditions you have to use in order to be careful and control everything in an experiment with rat-running.I looked into the subsequent history of this research. The next experiment, and the one after that, never referred to Mr. Young. They never used any of his criteria of putting the corridor on sand, or of being very careful. They just went right on running rats in the same old way, and paid no attention to the great discoveries of Mr. Young, and his papers are not referred to, because he didn't discover anything about rats. In fact, he discovered all the things you have to do to discover something about rats. But not paying attention to experiments like that is a characteristic of cargo cult science. " 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. 345

„From a long view of the history of mankind — seen from, say, ten thousand years from now — there can be little doubt that the most significant event of the 19th century will be judged as Maxwell's discovery of the laws of electrodynamics.“

—  Richard Feynman
Context: From a long view of the history of mankind — seen from, say, ten thousand years from now — there can be little doubt that the most significant event of the 19th century will be judged as Maxwell's discovery of the laws of electrodynamics. The American Civil War will pale into provincial insignificance in comparison with this important scientific event of the same decade. volume II; lecture 1, "Electromagnetism"; section 1-6, "Electromagnetism in science and technology"; p. 1-11

„Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Etiam egestas wisi a erat. Morbi imperdiet, mauris ac auctor dictum.“

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