A Quote by Werner Heisenberg

The uncertainty principle refers to the degree of indeterminateness in the possible present knowledge of the simultaneous values of various quantities with which the quantum theory deals; it does not restrict, for example, the exactness of a position measurement alone or a velocity measurement alone.

Werner Heisenberg

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Alone Knowledge Deals Degree Does Exactness Example For Example Measurement Position Possible Present Principle Quantum Quantum Theory Restrict Simultaneous Theory Uncertainty Uncertainty Principle Values Various Velocity Which

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Werner Heisenberg
German - Physicist
December 5, 1901 - February 1, 1976

The uncertainty relation does not refer to the past; if the velocity of the electron is at first known and the position then exactly measured, the position for times previous to the measurement may be calculated.

Werner Heisenberg

Any measurement must take into account the position of the observer. There is no such thing as measurement absolute, there is only measurement relative.

Jeanette Winterson

The concept of 'measurement' becomes so fuzzy on reflection that it is quite surprising to have it appearing in physical theory at the most fundamental level ... does not any analysis of measurement require concepts more fundamental than measurement? And should not the fundamental theory be about these more fundamental concepts?

John Stewart Bell

Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle. String theory does so again because a point particle is replaced by a string, which is more spread out.

Edward Witten

The Theory of Relativity confers an absolute meaning on a magnitude which in classical theory has only a relative significance: the velocity of light. The velocity of light is to the Theory of Relativity as the elementary quantum of action is to the Quantum Theory: it is its absolute core.

Max Planck

Unless a thing can be defined by measurement, it has no place in a theory. And since an accurate value of the momentum of a localized particle cannot be defined by measurement it therefore has no place in the theory.

Richard P. Feynman

The more precise the measurement of position, the more imprecise the measurement of momentum, and vice versa.

Werner Heisenberg

The incomplete knowledge of a system must be an essential part of every formulation in quantum theory. Quantum theoretical laws must be of a statistical kind. To give an example: we know that the radium atom emits alpha-radiation. Quantum theory can give us an indication of the probability that the alpha-particle will leave the nucleus in unit time, but it cannot predict at what precise point in time the emission will occur, for this is uncertain in principle.

Werner Heisenberg

Monetary calculation is not the calculation, and certainly not the measurement, of value. Its basis is the comparison of the more important and the less important. It is an ordering according to rank, an act of grading (Cuhel), and not an act of measuring. It was a mistake to search for a measure of the value of goods. In the last analysis, economic calculation does not rest on the measurement of values, but on their arrangement in an order of rank.

Ludwig von Mises

Science cannot progress without reliable and accurate measurement of what it is you are trying to study. The key is measurement, simple as that.

Robert D. Hare

Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.

Edward Witten

Over and above the various prejudices I acknowledge, the affinities I feel, the attractions I succumb to, the events which occur to me and to me alone- over and above a sum of movements I am conscious of making, of emotions I alone experience- I strive, in relation to other men, to discover the nature, if not the necessity, of my difference from them. Is it not precisely to the degree I become conscious of this difference that I shall recognize what I alone have been put on this earth to do, what unique message I alone may bear, so that I alone can answer for its fate?

Andre Breton

I feel passionately about measurement - about how difficult it is, about how much theory and conceptualization is involved in measurement, and indeed, how much politics is involved.

Angus Deaton

... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.

Albert Einstein

By the help of God and with His precious assistance, I say that Algebra is a scientific art. The objects with which it deals are absolute numbers and measurable quantities which, though themselves unknown, are related to "things" which are known, whereby the determination of the unknown quantities is possible.