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What is the main difference between Classical free Electron theory and Quantum free Electron theory?
Wiki User
∙ 15y ago
Electrons are fermions and thus cannot occupy the same quantum states. They obey Fermi-Dirac statistics, and will occupy energy levels accordingly. This is different to the classica state where all electrons are pretty much equal (equal energies etc) and are not taken to be distrubuted amongst multiple states and energies. See Fermi Gas Model for a treatment of quantum free electron theory.
Wiki User
∙ 15y ago
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What is the difference between quantum physics and physics?
Nothing. Quantum is a branch of physics
What is the difference between two isotopes of an electron?
There is no difference. Electrons are subatomic particles and therefore identical.Added:In the same orbital, defined by one 'tri' set of quantum numbers (n, l, and ml ) the spin quantum number differs, the two values being ms = +1/2 and ms = -1/2, are each taken by one electron.
Why is it impossible for an electron to have the quantum numbers n3 i1?
I am checking the Wikipedia article on "quantum number", and don't find a quantum number "i" for the electron. If you mean "l", it seems that "l" can be between 0 and n-1. So, for n = 3, l can be between 0 and 2. If this is what you mean, I don't see any reason that would forbid this particular combination.
Why specific solution absorb at specific wavelength?
It has to do with the energy level accessible to the electron in a particular type of bond or orbital. The difference between the two energy levels determines the energy of the quantum step and consequently the frequency of the light absorbed or emitted.
What is quantum tunelling?
Short Explanation:Quantum tunneling is one of the traditional examples of something that is permitted by quantum physics and is completely forbidden by classical physics and does indeed happen as quantum theory predicts. It is manifested only for small light particles where classical physics breaks down.When the motion of a particle is confined, usually by some potential energy barrier, it can not cross that barrier if it does not have a kinetic energy that is sufficient to exceed to potential energy requirements of the barrier. Quantum theory says that a quantum system prepared in one region that is separated from another by such a barrier can traverse the barrier even if it does not have sufficient kinetic energy. It does this by "quantum tunneling" and there is a finite probability that the particle can be detected in the region where the potential energy is actually greater than the kinetic energy.Perhaps a longer example and explanation:A "voltage" between two points represents the amount of energy per unit charge that is needed to move a charge particle between the two points. In other words, it takes twice as much energy to move a charged particle between two points of 10 volts than the same particle between 5 volts.The energy unit "electron-volt" (eV) is the amount of energy that is required to move one electron between a potential difference of one volt. It's a pretty small amount of energy.If there is a potential difference of 2 volts between two points, and an electron with kinetic energy of 3 eV reaches the first point, it has enough kinetic energy to get to the second point. However, if its kinetic energy is only 1 eV, then it does not have enought kinetic energy to do so. Certainly makes sense, right?Quantum tunneling is an unusual fact seen in sub-atomic interactions. Although this is VASTLY over-simplified, it basically states that an electron with LESS kinetic energy than that needed to overcome a voltage barrier (say, one with 1.99 eV of energy reaching a 2.00 volt barrier) has a certain probability of overcoming the barrier. The probability can be calculated, but ONLY the probability. In other words, we can never know for certain if a SPECIFIC particle will (or will not) get through the barrier, we can only calculate the probability of it doing so.This fact has been confirmed in experimental results, and agree completely in keeping with predictions. In classical mechanics, an electron either does or does not have enough energy to go through a barrier. In quantum mechanics, the electron has a certain probability of doing so.
How can you tell the difference between 1s subshell and 3s subshell?
You can tell the difference between 1s subshell and 3s subshell using quantum numbers and electron configuration.
What is the difference between field emission and photoelectric emission?
* emisssion of electron from the surface of the metal when light of suitable frequency falls-photoelectric emission. * emision of electron from the metal by quantum tunnling of electron.
How big is a quantum leap?
A quantum leap is the smallest possible change that an electron can make in an atom. It involves a discrete jump in energy levels when an electron transitions from one orbit to another. The size of a quantum leap is determined by the difference in energy levels between the initial and final states of the electron.
What is the difference between romantic and classical comedy?
what is the difference between classical
Explain the difference between the energy lost or gained by an atom according to the laws of classical physics and according to the quantum model of an atom?
classical physics views energy changes as continuous. In the Quantum concept, energy changes occur in tiny discrete units called quanta
What must occur when an electron in an atom returns from a higher energy state to a lower energy state?
If an electron transits to a lower energy level, it releases a quantum of energy which is equivalent to the energy difference between the states. If the electron travels to upwards, it absorbs a similar quantum of energy.
What is the difference between quantum physics and physics?
Nothing. Quantum is a branch of physics
Distinguish between quantum and classical physics?
Newtonian, or classical physics applies to physical, every day things, while quantum physics is a type of theoretical physics that does not apply to any physical things.
What is the difference between two isotopes of an electron?
There is no difference. Electrons are subatomic particles and therefore identical.Added:In the same orbital, defined by one 'tri' set of quantum numbers (n, l, and ml ) the spin quantum number differs, the two values being ms = +1/2 and ms = -1/2, are each taken by one electron.
What happens to an electron during a quantum leap?
In physics, a quantum leap or jump is the change of an electron from one energy state to another within an atom. It is discontinuous; electrons jump from one energy level to another instantaneously, with no intervening or intermediary condition. The phenomenon contradicts classical theories, which expect energy levels to be continuous. Quantum leaps are the sole cause of the emission of electromagnetic radiation, including light, which occurs in the form of quantized units called photons. Ironically, when laymen use the term colloquially, they use it to describe large jumps in progress, when in reality a quantum leap is a very small change of state.
What is the difference between opera and classical music?
when you do opera its with your voice and when you do classical music its with an instrument
What is the difference of a light microscope and a scanning electron microscope?
A light microscope uses visible light to magnify and view specimens, offering lower magnification and resolution compared to a scanning electron microscope (SEM) which uses a focused beam of electrons to image the sample, providing higher magnification and resolution. SEM can produce 3D images of the sample surface while light microscopes typically provide 2D images.
