Quantum Mechanics

Parent Category: Physics
Quantum Mechanics is the branch of physics that deals with the study of the structure and behavior of atoms and molecules. It is primarily based on Max Planck's Quantum theory, which incorporates Heisenberg's uncertainly principle and the de Broglie wavelength to establish the wave-particle duality on which Schrodinger's equation is based.
De Broglie's wavelength is expressed as h/mv where h= Planck'sconstant (6.63x10-34) and mv=momentum (or mass x velocity )
The wavelength of light times the frequency of light is its speed, which is close to 2.9979*10 8 m/s in most mediums.
One of the quantities used to describe a system in classicalmechanics, such as the coordinates of a particle, thecomponents ofits velocity, the momentum, or functions of these quantities.
Electrical current flows along the surface of a metal, so no, it does not flow through the core of a wire, just the surface.
Fundamental particles such as the electron or the photon have anintrinsic spin, and this spin can't change - for example, anelectron always has a spin of 1/2. I don't think the Pauli equation would change that.
A Newton*Meter (NÂ·m) is a Joule (J) and a Joule is the derived unit of energy in SI units. N=(kg*m/s^2) so a NÂ·m=(kg*m^2/s^2)=J. An electron volt is also a quantity of energy equal to approximately 1.602Ã10 â19 J. Correspondingly, one joule equals 6.24150974Ã10 18 eV. By...
Quantum mechanics ( QM ; also known as quantumphysics or quantum theory ), including quantum field theory , isa fundamental branch of physics concerned withprocesses involving, for example, atoms and photons . Systems such asthese which obey quantum mechanics can be in a quantum...
the attraction of metal ions to mobile electrons
In general, the Laplace operator in n dimensions is â 2 = (â/â x 1 ) 2 + (â/â x 2 ) 2 + ... + (â/â x n ) 2 , and the eigenfunctions are the solutions f ( x 1 , x 2 , ..., x n ) of the partial differential equation: â 2 f = - Î» f , ...
Solids gasses and liquids should also include frequency as anelement
First, you got to understand something. A black hole is just as ablock of ice. The smaller it is the faster it melts. So speakingscientifically the black hole releases radiation relatively fasterwhen its smaller than when it's bigger, which heats up the deadstar. For that reason the black holes...
Different frequincies of light cause color, but a photon can not have color because it is only a single particle of light
The basic idea is that elementary particles are not point like, like the Standard Model assumes, but are instead tiny strands of energy. If you want to know more about String Theory there is a very good documentary which you can look for free on the internet. It should be understandable to the...
The photon does have mass. You can easily solve for it. Energy of a photon is ( Planck's konstant times frequency). But kinetic energy of any moving object is also ( 1/2 m V 2 ). For a photon, 'V' is 'c', so ( h f ) = (1/2 m c 2 ) , and [ m = ( 2 x Planck's konstant x frequency) / c 2 ] ....
The Higgs boson was first theorized in the 60's, and now, at CERN, the LHC (Large Hadron Collider) has just reopened after some technical difficulties. This machine will collide particles up to 3.5 Tev. The hope is that in the debris, a Higgs boson will materialize, probably for a very, very short...
The Higgs field has a non-trivial self-interaction, which leads to spontaneous symmetry breaking: in the lowest energy state the symmetry of the potential (which includes the gauge symmetry) is broken by the condensate. In the simplest example, the spontaneously broken field is described by a...
There is no real difference behind the terms quantum mechanics and quantum physics and quantum theory. If one wants to make a linguistic distinction, you can. Quantum theory is the more encompassing term including any theoretical explanations of quantum phenomena and and generalization. ...
best way to write above question is: Work function = 6.08*10^-19J This is energy Min required to free one electron. what max wavelength is requred to cause this event? remember wavlength inversely proportional to energy of photon via planks constant h hence E = hV but E = hc / (wavelength) ...
In QM, you can't know for certain both the momentum and position of an object. However, in CM you can. For instance, take a chair sitting still in a room. It is still, so it's momentum is zero. You are looking at it, you can go over and measure all its dimensions with a ruler and relative to other...
Plasma , found all over the Universe, common examples: stars, neon signs, and some cutting and welding equipment.
The maximum number in a f-orbital is 14 electrons.
Niels Bohr, one of the main developers of quantum mechanics in the 1920s & 1930s.
The beat frequency is the difference of the overlapped frequencies. Thus the other frequency is either 445 or 435 Hz. For detail, read the wikipedia page on Beat(acoustics)
Please note that the "color charge" (red, green, blue, anti-red,anti-green, anti-blue, white = neutral) of quarks is completelyunrelated to the colors we see. It's just a fancy name given tothem. As far as I know, quantum chronodynamics doesn't analyze wherethese color charges come from; only how...
Lagrangian (L) summarizes the dynamics of the system. Generally, in classical physics, the Lagrangian is defined as follows: L=T-V where T is kinetic energy of the system and V is its potential energy. If the Lagrangian of a system is has been defined, then the equations of motion of the...
It depends on what you mean by leading. A few good candidates are string theory, the standard model and loop quantum gravity.
Quantum mechanics and relativity are both parts of the same puzzle: how the universe works. They are both equally important, because they both explain things that are not explained by classical physics.
A quantum of light is also called a photon. Photons have energy and so must also have mass. This is from the famous equations of Einstein. We know the energy of a photon ... (Planck's constant) times (c)/(wavelength). We know the speed of the photon ... it's the speed of light. We know the...
I believe the smallest particle known of at present is the neutrino (which translates to "small neutral one") They have minimal interaction with other particles, with no electric charge, and a "small but non-zero mass." According to wikipedia, the mass is believed to be less than 0.3 electronvolt...
QM isn't suitable for large systems as they have properties which can be seen where at the subatomic level you can say with more ease that nothing has any exact properties.
The quantum theory of gravity is that they are made up of particles called gravitons. This theory is in the early stages, though.
Quantum Mechanics and Quantum Physics apply to so many aspects of science that, despite how radical it is, its still accepted. This is because almost all of astronomical physics and other areas of science would just collapse! For example, black holes appear to radiate energy, but a black hole (by...
Definitely not, but using Classical mechanics you should be able to solve this question. Also, I imagine engineers in the field of fluid dynamics might be able to answer your question.
E_c = 10^{18} Volt/meter Global cyrillic mode disabled.
Well, that depends on what you meant by "benefits". Either way, both of them have their limitations. Classical mechanics can not be used to accurately describe an atom. Just as quantum mechanics would be useless if you were asked to find the terminal velocity of a baseball. Both areas have give us a...
normally it is considered to be the charge on an electron. however quarks come in increments of 1/3 of this charge.
Associated with each measurable parameter in a physical system is a quantum mechanical operator. Now although not explicitly a time operator the Hamiltonian operator generates the time evolution of the wavefunction in the form H*(Psi)=i*hbar(d/dt)*(Psi), where Psi is a function of both space and...
In a word. No. Grand unification is also commonly called the Theory of everything. Which in a sense, there would exist an equation of a set of equations that every other physics equation can be derived from. A quantum theory of gravity would only help to better blend quantum mechanics and classical...
Quantum internet refers to the application of quantum cryptographyover a "quantum" network. Quantum cryptography yields unbreakableencryption due to the uncertainty principle. The technology isstill very new and needs more research for commercialization.
Yes. Objects deeper in a gravity well see things further away as moving faster; likewise, objects far away see objects deep in the well moving more slowly. This has real consequences here on Earth: a plane flying high in the sky is in a shallower region of Earth's gravitational well, while a...
Latent means present but not visible or apparent.
The system is doing net work.
It is a branch of physics dealing with physical phenomena atmicroscopic scales. Quantum mechanics departs from classicalmechanics primarily at the quantum realm of atomicand subatomic length scales. Hope this Helps:) It did! thank you where ever you might be! ~LionBeats
He is famous for his two papers on relativity. Special relativity and general relativity. He is also famous for his paper on brownian motion.
Quantum Possibility or probability is the concept that you can never say an objects location or any other properties you can only say what they are likely to be
W=P(Vf-Vi) W=(2x10^5pa)*(6.00m^3 - 3.00m^3) W=6x10^5 pam^3 But 1 pascal is equal to 1 (Newton)/(meter^2) W=6x10^5 Nm=6x10^5 Joules
Î + and Î 0 are different from the nucleons in the following respects: Isospin - Delta baryons have an isospin of 3/2, while the nucleons have an isospin of 1/2 J p - Î + and Î 0 have a the total angular momentum of 3/2 and a positive parity, the nucleons have the...
Light always travels in a straight line with respect to space-time. If it appears to the observer that the light beam has bent it can only be concluded that space-time is bent.
There are many important quantum mechanic properties of particles. Some of them include spin, isospin, momentum, mass, rest mass, electrical charge, colour charge, quark structure (only hadrons) wave function (wave - particle duality), strangeness, interactions (electromagnetism, strong nuclear...
Gravity, electromagnetic, strong and weak nuclear force
Wave-particle duality is how electrons can behave like either waves or particles in different situations. This is one of the fundamental things about quantum that we do not yet understand.
a free electron may absorb a photon only if its parity changes
The Speed of Light is considered infinite speed, as no matter can reach the speed of light.
In physics, a quantum is the minimum unit of any physical entity involved in an interaction. Since there is no minimum unit of time that is currently known then, no, there is no quantum time. Aside: If one thinks of the term "quantum" more colloquially then you might say that it is a unit that is...
There is a certain level of similarity between NLP & QM NLP = Neuro-linguistic programming: This is a method invented in the 1970's by a linguist, physiologist, and anthropologist. It is a method used to change behavior, i.e. develop good habits and eliminate negative ones. It relies on the...
The following is the most correct answer- -Heisenberg's Uncertainty principles arises as one cannot find simultaneous eigenstates of conjugate operators (i.e. p and x or Lx and Ly) for atomic and subatomic objects. Because one cannot find such simultaneous eigenstates, the particle in question can...
Answer quantum field theory, quantum electrodynamics, quantum chromodynamics, string theory . Energy is quantized
If something is clear, the light simply passes through the object. If something is white the light is all reflected, black it is all absorbed, clear, it would pass through. (White) | | (Black) |
Unitary matrices leave the expectation value unchanged. We need the mixing matrix to be unitary (to preserve the mixed quarks as a basis, to preserve length); if VCKM were not unitary, it would perhaps suggest that a fourth generation of quarks needed to be considered or included.
No. It would take significantly longer. A pressure wave would not move through the rod at the speed of light. According to the internet, the speed of sound in steel is 4512m/s. I'm not sure if a pressure wave would move through the rod at the the same speed as sound, but assuming that they're on a...
That their was a unit of charge, for which no smaller amount of charge could exist, was first suggested in the late 1800s. In 1896, J.J. Thomson showed that a negatively charged particle was a fundamental particle of nature -- ie, that electrons had a particle nature. Louis de Broglie, in his 1924...
The distinction is sometimes made to distinguish normal quantum mechanics (which does not incorporate special relativity) and quantum field theory (relativistic quantum mechanics). Since we know special relativity is correct it is the relativistic form of quantum mechanics which is true, but non...
A ballistic electron travels a straight course through a semiconductor without scattering off any atoms. In other words it travels through a material as if the material had no atoms in it.
i assume you mean photon but I'm not 100% but "In physics, a photon is an elementary particle, the quantum of the electromagnetic interaction and the basic "unit" of light and all other forms of electromagnetic radiation. It is also the force carrier for the electromagnetic force . The...
A object smaller than a quark has been found but not directly. This object is the singularity at the centre of every black hole. This is a place where all the laws of physics, mathematics or anything else break down and are cast aside. Our universe in theory started with a singularity. It is the...
It explaines the structure of atoms, atomic nuclei , and molecules; the behaviour of subatomic particles; the nature of chemical bonds ; the properties of crystalline solids ; nuclear energy; and the forces that stabilize collapsed stars. It also led directly to the development of the laser, the...
Quantum mechanics describes the Zeeman effect as the splitting of energy leves. It is caused by the so called "m" quantum number. This effectively quantises the orientation of the electrons orbit. m can take values from -n to n where n is the principle quantum number. for example if n = 1 then m = ...
Dr.Boson suggested that the particles around us gain mass when they enter a feild.This feild was yet to be discovered buut on july4 2012 the particles constiuting this feild were found .Two protons were accelarated and they were forced to colide.This led to the formation of the gods particles.they...
The model that simply showed atoms as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus-similar in structure to the solar system, but with electrostatic forces providing attraction, rather than gravity.
a ballistic galvanometer is a specially designed galvanometer suitable for measuring the total quantity of electricity or charge displaced by a varying current of short duration such as charging & discharging of a capacitor >>>>
Plastic melts. Metals conduct heat energy just as well as the do electrical energy. That leaves Ceramic.
The real science behind Flashforward http://newscenter.lbl.gov/feature-stories/2009/09/17/flashforward/
Supersymmetry is a theory that says every fermion (a type of particle like protons, neutrons and electrons) has a supermassive (not sure what supermassive is) partner. Not sure about supergravity either so i think I've just raised more questions.
We now know there are are six quarks (or called flavours of quarks), which are grouped into 3 pairs (or generations); up & down, charmed & strange and top and bottom. It is these fundamental particles which form neutrons, protons etc, which are collectively known as hadrons, (it is mainly the up and...
The fullform of APPLE stands for: Ariane Passenger PayloadExperiment.
No. Planck's paternal great-grandfather and grandfather were both professors of theology in GÃ¶ttingen. His father was a law professor in Kiel and Munich, and his paternal uncle was a judge. Planck was baptised with the name of Karl Ernst Ludwig Marx Planck.
Actually, we can't even confirm the existence of atoms, let alone subatomic particles. But when scientists conduct experiments, they come to the conclusion that the particles are indeed valid. The more discrete physics becomes, the more theoretical it is.
Negatively charged pions decay into muons and muon anti-neutrinos via the weak nuclear interaction. The probability of such a decay occurring is approximately 99.98%. Muons can also decay into electrons and electron anti-neutrinos, but the probability of such a thing occurring is only about 0.012%...
Einstein theorized that in the same why mass was energy, time was space. So, in effect, time could be nothing more than a simplification of the three dimensions we live in.
A blackbody can only emit a finite amount of power, so the curve better decline. In other words the integral from nu = 0 to nu=positive infinity had better be finite.
Enthalpy refers to the total energy content of the system. It is represented in thermodynamics as H=E+PV, where H refers to the total enthalpy of the system, E refers to the total internal energy of the system, P referes to the pressure of the system and V refers to the volume of the system. Any...
The central component of a flux capacitor is a charged dilithium crystal. This is very difficult to obtain, but the other components (pre-rearranged dark matter etc.) are quite common. Try and find a scrapped space-drone, as most of these contain a small amount of lesser, or opaque dilithium. Once...
Yes, energy can be converted into matter and vice versa. Consider the creation of an electron-positron pair in pair production by the passage of a high energy electromagnetic ray (a high energy photon) near an atomic nucleus. This is the conversion of electromagentic energy into matter. It...
when data shows electron energy levels are not related to light wavelengths.
The mass of matter explains the warping effect of space but what gives the matter mass in the first place? Theorists say there is a large particle, which is a product of symmetry, that gives things mass. And that particle is the Higgs boson. As for gravitons, these are the (theorized) gauge...