I think I can safely say that nobody understands Quantum Mechanics. — Richard P. Feynman Copy Share Image
As usual, nature's imagination far surpasses our own, as we have seen from the other theories which are subtle and deep. — Richard P. Feynman Copy Share Image
You can’t say A is made of B or vice versa. All mass is interaction. — Richard P. Feynman Copy Share Image
All theoretical chemistry is really physics; and all theoretical chemists know it. — Richard P. Feynman Copy Share Image
Because atomic behavior is so unlike ordinary experience, it is very difficult to get used to, and it appears peculiar and mysterious… — Richard P. Feynman Copy Share Image
When the problem [quantum chromodynamics] is finally solved, it will all be by imagination. Then there will be some big thing about… — Richard P. Feynman Copy Share Image
Einstein's gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational phenomena… — Richard P. Feynman Copy Share Image
The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to… — Richard P. Feynman Copy Share Image
Today, all physicists know from studying Einstein and Bohr that sometimes an idea which looks completely paradoxical at first, if analyzed to… — Richard P. Feynman Copy Share Image
As you know, a theory in physics is not useful unless it is able to predict underlined effects which we would otherwise… — Richard P. Feynman Copy Share Image
With the exception of gravitation and radioactivity, all of the phenomena known to physicists and chemists in 1911 have their ultimate explanation… — Richard P. Feynman Copy Share Image
The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked… — Richard P. Feynman Copy Share Image
It is going to be necessary that everything that happens in a finite volume of space and time would have to be… — Richard P. Feynman Copy Share Image
“The uncertainty principle “protects” quantum mechanics. Heisenberg recognized that if it were possible to measure the momentum and the position simultaneously with… — Richard P. Feynman Copy Share Image
When I was a young man, Dirac was my hero. He made a breakthrough, a new method of doing physics. He had… — Richard P. Feynman Copy Share Image
In fact, the science of thermodynamics began with an analysis, by the great engineer Sadi Carnot, of the problem of how to… — Richard P. Feynman Copy Share Image
All things are made of atoms-little particles that move around in perpetual motion, attracting each other when they are a little distance… — Richard P. Feynman Copy Share Image
People are always asking for the latest developments in the unification of this theory with that theory, and they don't give us… — Richard P. Feynman Copy Share Image
People are always asking for the latest developments in the unification of this theory with that theory, and they don't give us… — Richard P. Feynman Copy Share Image
We seem gradually to be groping toward an understanding of the world of subatomic particles, but we really do not know how… — Richard P. Feynman Copy Share Image
If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors… — Richard P. Feynman Copy Share Image
It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's… — Richard P. Feynman Copy Share Image
From a long view of the history of mankind the most significant event of the nineteenth century will be judged as Maxwell's… — Richard P. Feynman Copy Share Image
I think we can safely assume that no one understands quantum mechanics. — Richard P. Feynman Copy Share Image
The electron is a theory. But the theory is so good we can almost consider them real. — Richard P. Feynman Copy Share Image
If you think you understand quantum mechanics, you don't understand quantum mechanics. — Richard P. Feynman Copy Share Image
Another thing I must point out is that you cannot prove a vague theory wrong. — Richard P. Feynman Copy Share Image
The present situation in physics is as if we know chess, but we don't know one or two rules. — Richard P. Feynman Copy Share Image
The electron is a theory we use; it is so useful in understanding the way nature works that we can almost call… — Richard P. Feynman Copy Share Image
There is one simplification at least. Electrons behave ... in exactly the same way as photons; they are both screwy, but in… — Richard P. Feynman Copy Share Image
Therefore psychologically we must keep all the theories in our heads, and every theoretical physicist who is any good knows six or… — Richard P. Feynman Copy Share Image
There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there… — Richard P. Feynman Copy Share Image
[Quantum mechanics] describes nature as absurd from the point of view of common sense. And yet it fully agrees with experiment. So… — Richard P. Feynman Copy Share Image
“No phenomenon directly involving a frequency has yet been detected above approximately 10^12 cycles per second. We only deduce the higher frequencies… — Richard P. Feynman Copy Share Image
When a photon comes down, it interacts with electrons throughout the glass, not just on the surface. The photon and electrons do… — Richard P. Feynman Copy Share Image
Unless a thing can be defined by measurement, it has no place in a theory. And since an accurate value of the… — Richard P. Feynman Copy Share Image
It is a curious historical fact that modern quantum mechanics began with two quite different mathematical formulations: the differential equation of Schroedinger… — Richard P. Feynman Copy Share Image
Scientific views end in awe and mystery, lost at the edge in uncertainty, but they appear to be so deep and so… — Richard P. Feynman Copy Share Image
“Philosophers have said before that one of the fundamental requisites of science is that whenever you set up the same conditions, the same thing… — Richard P. Feynman Copy Share Image
My rule is, when you are unhappy, think about it. But when you're happy, don't. Why spoil it? You're probably happy for some ridiculous… — Richard P. Feynman Copy Share Image
Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic… — Richard P. Feynman Copy Share Image
Mathematics is a language plus reasoning; it is like a language plus logic. Mathematics is a tool for reasoning. — Richard P. Feynman Copy Share Image
It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions. — Richard P. Feynman Copy Share Image
“There was a Princess Somebody of Denmark sitting at a table with a number of people around her, and I saw an empty chair… — Richard P. Feynman Copy Share Image
All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't. — Richard P. Feynman Copy Share Image
“There's a big difference between knowing the name of something and knowing something.” — Richard P. Feynman Copy Share Image
The fact that you are not sure means that it is possible that there is another way someday. — Richard P. Feynman Copy Share Image
One cannot understand... the universality of laws of nature, the relationship of things, without an understanding of mathematics. There is no other way to… — Richard P. Feynman Copy Share Image