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The first complete quantum field theory, quantum electrodynamics, provides a fully quantum description of the electromagnetic interaction. Quantum electrodynamics is, along with general relativity , one of the most accurate physical theories ever devised.
Quantum physics is the study of matter and energy at the most fundamental level. It aims to uncover the properties and behaviors of the very building blocks of nature. While many quantum experiments examine very small objects, such as electrons and photons, quantum phenomena are all around us, acting on every scale.
15 de ago. de 2020 · By Richard Webb. What is quantum physics? Put simply, it’s the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the...
quantum mechanics, science dealing with the behaviour of matter and light on the atomic and subatomic scale. It attempts to describe and account for the properties of molecules and atoms and their constituents— electrons , protons, neutrons, and other more esoteric particles such as quarks and gluons.
This model, which is the basis of the modern understanding of the atom, is known as the quantum mechanical or wave mechanical model. The fact that there are only certain allowable states or energies that an electron in an atom can have is similar to a standing wave.
- Why is the spin number expressed as +1/2 or -1/2, rather than just +1 or -1 ?In the spin quantum number the electrons are represented either by +1/2 or -1/2, and as shown in the quantum numbers video it is said that the elec...
- I've some questions on this statement: The square of the wave function represents the probability ...It's mostly a function in mathematics. It would be like asking "what is the average distance of a cosine wave from the center?" - and this might se...
- referring to the image on orbital shapes, why do the p,d,f orbitals have such "out of the blue" shap...The shapes have been calculated from Schrodinger's equation. Moreover , the shapes represent the region where the probability of finding the electr...
- So the formula for de Broglie equation says that lambda= h/mv and..the v of a stationary object will...Isn't to do with the fact that the velocity is not quite 0? if you know it is exactly 0 then the uncertainty in the position is infinite as well (m...
- On Schrödinger's equation, what exactly is the Hamiltonian operator? How do we work with it mathemat...This has to do with Laplacian operator (partial derivative) of a wave function. Here's the formula http://hyperphysics.phy-astr.gsu.edu/hbase/quant...
- In reference to Shrodinger's Equation, what's the difference between the V (wave function symbol) on...You can't cancel out the ψ's like that because Hψ is not H times ψ but rather H operating on ψ (that's what the ^ over the H indicates). The Hamilt...
- I have a really blurry picture of what it means for small particles to behave as both particles and ...I think I can safely say that nobody understands quantum mechanics. - Feynman So you are right on track! :) But to be more pedagogical, you can vie...
- Can we specify type of the wave in schrodinger wave? like transversal or longitudinalI never thought about it before. Its interesting question. My guess is that it is transverse. though, to honest, there is so much dispute about the...
- Does anyone know exactly what "spin" is? If a particle has "spin", it doesn't actually physically sp...Spin is just a property that electrons (and other particles) have. It got named spin back when people were working with the Bohr model and trying t...
- Do nodes of the 1s, 2s, 3s... subshells overlap? (wrt to the graph shown above, it seems they do) If...Atomic orbitals are defined by energy levels not positions. The electron clouds that are depicted are usually where there is a 90% chance of findin...
29 de nov. de 2000 · Quantum Mechanics. Four basic principles of quantum mechanics are: (3.1) Physical States. Every physical system is associated with a Hilbert Space, every unit vector in the space corresponds to a possible pure state of the system, and every possible pure state, to some vector in the space.
28 de abr. de 2023 · Quantum theory is about to turn 100. Together with general relativity, it has defined the physics of the twentieth century and enabled much of the technology we use today.
