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For every quantum state, the standard deviation of it's position multiplied by the standard deviation of it's momentum has to be larger than or equal to the reduced Planck constant divided by two.

σxσp ≥ hbar/2

This doesn't mean that you can't measure position and momentum at the same time. What it means is that the products of their deviations from their expectation values can't go lower than hbar/2, ie. there is a limit to the combined precision of the two measurements.

It can also be shown that the combined precision of several other quantities have a lower limit, such as energy and time.

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13y ago
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10y ago

The Heisenberg Uncertainty Principle states that you can not simultaneously know both the position and momentum of a quantum particle accurately. The more precisely you know the position, the less you know about the momentum and vice-versa.

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11y ago

It implies that an electron cannot behave as a matter as well as an electromagnetic wave in a specified infinitesimal time. But the electrons show either matter or wave characteristics according to the surroundings.

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12y ago

It is impossible to know the values of certain "complementary" values beyond a certain precision. The best-known example of complementary values is moment and position. To be more precise, the product of the uncertainty in both measurements can not be less than a certain constant.

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13y ago

Heisenberg uncertainty principle states that , the momentum & position of a particle cannot be measured accurately & simultaneously.

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14y ago

It is impossible to no both the momentum and position of an electron

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14y ago

both the momentum and position of an electron

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Q: The Heisenberg Uncertainty Principle states that it is impossible to know?
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What law says it is impossible to determine the exact location and velocity of an electron at any given moment?

This is because of the Heisenberg uncertainty principle. It is a part of quantum mechanics. It has to do with an electron having properties of both a particle and and wave. If you only imagine an electron to be a particle, this can be somewhat explained by the process of measuring the position or velocity of the electron. If the data is measured with light, then when a photon hits the electron, it changes the electrons speed and position. We may be able to find one, but in the process, the other will be changed.


What force attracts a positive charge towards a negative charge?

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The Pauli exclusion principle states that no two electrons in the same atom can?


Where are the 3 particles that make up an atom located in the atom?

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Related questions

What are the two parts of the Heisenberg uncertainty principle?

Heisenberg uncertainty principle states that , the momentum and the position of a particle cannot be measured accurately and simultaneously. If you get the position absolutely correct then the momentum can not be exact and vice versa.


States that is imposible to know both the velocity and the position of a particle at the same time?

The heisenberg uncertainty principle is what you are thinking of. However, the relation you asked about does not exist. Most formalisms claim it as (uncertainty of position)(uncertainty of momentum) >= hbar/2. There is a somewhat more obscure and less useful relation (uncertainty of time)(uncertainty of energy) >= hbar/2. But in this relation the term of uncertainty of time is not so straightforward (but it does have an interesting meaning).


According to Heisenberg uncertainty principle if the position of a moving particle is known what other quantity cannot be known?

According to the Heisenberg uncertainty principle if the position of a moving particle is known velocity is the other quantity that cannot be known. Heisenberg uncertainty principle states that the impossibility of knowing both velocity and position of a moving particle at the same time.


According to the heisenberg uncertainty principle if the position of a moving particle is known what other cannot be known?

According to the Heisenberg uncertainty principle if the position of a moving particle is known velocity is the other quantity that cannot be known. Heisenberg uncertainty principle states that the impossibility of knowing both velocity and position of a moving particle at the same time.


What atomic theory did Werner Heisenberg discover?

Werner Karl Heisenberg was a renowned German physicist and philosopher. In 1925 he discovered a way to formulate quantum mechanics with matrices. As a result of his discovery, Heisenberg was awarded the Nobel Prize for Physics in 1932.


Is the heisenberg uncertainty principle a theory of measurement or a physical property of the universe?

Heisenberg's Uncertainty Principle is a property of very small (sub-atomic) objects, and states (in effect) that one cannot know both the velocity of a particle and its exact location. This is true of larger objects as well, but at such an infinitely small scale that it is as close to 0 as you can get.


Why quantem mechanics rules are different for small and heavenly bodies?

The rules are the same, but the quantum effects are more relevant for small objects. For example, the Heisenberg Uncertainty Principle states that the product in the uncertainties in position and momentum can't go below a certain limit. Ordinary-sized object have such a huge mass, and thus, such a huge momentum, that the Uncertainty Principle can safely be ignored.The rules are the same, but the quantum effects are more relevant for small objects. For example, the Heisenberg Uncertainty Principle states that the product in the uncertainties in position and momentum can't go below a certain limit. Ordinary-sized object have such a huge mass, and thus, such a huge momentum, that the Uncertainty Principle can safely be ignored.The rules are the same, but the quantum effects are more relevant for small objects. For example, the Heisenberg Uncertainty Principle states that the product in the uncertainties in position and momentum can't go below a certain limit. Ordinary-sized object have such a huge mass, and thus, such a huge momentum, that the Uncertainty Principle can safely be ignored.The rules are the same, but the quantum effects are more relevant for small objects. For example, the Heisenberg Uncertainty Principle states that the product in the uncertainties in position and momentum can't go below a certain limit. Ordinary-sized object have such a huge mass, and thus, such a huge momentum, that the Uncertainty Principle can safely be ignored.


What does the Heisensberg uncertainty principal state?

The Heisenberg Uncertainty Principle states that it is impossible to know both the position and momentum of an electron within at atom's electron cloud. As soon as you determine one property, the other is rendered invalid by your means of measurement.


Do electrons travel so fast that it is impossible to know their exact location?

No, that's not how it works. The Heisenberg Uncertainty Principle states that there is a limit to how precisely you can measure position and momentum simultaneously. Actually, it's not just about measuring, position and momentum are not DEFINED at the same time, with arbitrary precision.An electron can very well move slowly, but the Uncertainty Principle still applies.


What is the name of the theory that states observing nature can disrupt the natural course of things and lead to incorrect data you believe it is named after the scientist who first theorized it?

I believe that theory is called the Heisenberg Uncertainty Principle.


How is Heisenberg's Uncertainty Principal adapted to explain the Big Bang through the spontaneous creation of electrons and anti-electrons?

Well, at some point the universe was supposed to be smaller than what the Heisenberg Uncertainty Principle states we can measure, so one or the other of these concepts is wrong. I'm just a math guy so someone else will ahve to figure out where the mistake is.


Why can we not accurately predict where in the electron cloud electrons can be found?

We cannot accurately predict where in the electron cloud electrons can be found because of the Heisenberg uncertainty principle. This principle states that it is impossible to simultaneously know the exact position and momentum of an electron. As a result, we can only describe the probability distribution or the likelihood of finding an electron in a particular region of the electron cloud.