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Quantum Mechanics

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.

916 Questions

What is the Higgs boson accelerator?

It isn't. The Large Hadron Collider is a proton-accelerator & collider designed to investigate the most fundamental sub-atomic particles and forces, and to try to prove or disprove the existence & properties of the hypothesised Higgs Boson, though to be responsible for mass.

What is a bond axis?

Because the gravity of the Earth inside the PORCORN..

wetwew...............

NOW YOU KNOW

VIT WATER

Why are electrons affected by the addition of heat light or electricity?

Each of those has energy; so each of them MAY, under certain circumstances, knock an electron out of its orbit around the atom, or make it move around.

Did quantum code scam or real?

No, quantum code is not a scam. It is a very good program made by Aidan Booth and his colleagues. It is the best program in the online world. Millions of people are taking advantage of it.

How did quantum mechanics change our understanding of atoms?

Quantum mechanics explained principles like superposition of wave-particle duality of mater. It shaped a world where the classical laws of physics were merely a waste. It exposed to us a world of particles, that matter was made of many groups of particles each accomplishing a particular task just like our organs.

With the help of quantum mechanics we were able to get a 3 dimensional idea of the atom. It was able to explain the screening effect and the stark effect. It was also able to construct exact shape of orbitals and explain the formation of various types of compounds( A theory called hybridization and VSEPR and MOT came in handy thanks to quantum mechanics). It also explained the idea that atoms were composed of a lot more particles and helped predict their states nature and characteristics.

Is velocity of electrons increase by increasing voltage?

Depends on what is between the potential difference (ie, the voltage).

If it's an evaculated tube, and the electrons are travelling between the anode and the cathode without much interference, then then a higher voltage will mean that the electrons arrive with more kinetic energy -- ie, increased velocity.

However, if there's a wire between the two voltages, then the drift velocity of the electrons (which is pretty slow to begin with) does not increase, but only the number of electrons that are drifting.

Why does light have a dual wave particle model?

Everything in Quantum Mechanics does, not just light.

The reason it has to be modeled that way is because in experiments that are designed to detect particle behavior, things behave like a stream of particles, whereas in experiments that are designed to detect wave behavior, things behave like a wave. This has been verified experimentally with practically everything on the quantum scale: light, subatomic particles, atoms, thermal vibrations (phonons), quantum dots (composed of millions of atoms) in semiconductor crystals, etc.

Nobody really understands why nature is this way, we just know it is.

What is a mixed state in quantum mechanics?

The mixed state in quantum mechanics is the statistical ensemble of the pure states.

Is there any wave functio in quantum mechanics in 2d where there is no mass term?

Asin(2*pi*x/lambda + d) is the general wavefunction of a standing wave, and includes no mass term.

(Were A = amplitude, pi = 3.14159265358979323646, x = position, lambda = wavelength and d = phase at x=0).

Why are electrons in atoms only allowed to have specific amounts of energy?

The universe has a fine structure, it is said to be quantized, which means that matter, energy, space, and time come in discrete packages called quanta, rather than being infinitely divisible into ever smaller pieces. That is the basic discovery of quantum mechanics. Everything has specific amounts of energy, not just electrons, but those amounts can be very tiny. It is only when you get to the very small scale of subatomic particles such as electrons, that this quantization becomes noticeable.

Would a Unified theory like string theory or quantum gravity be intrinsically tied to empiricism?

It would depend if the theory were experimentally or obsversationally validated; in the case of String Theory (which is a theory of quantum gravity), more accurately called M-Theory (M-Theory unifies all five variants of String Theory into one with 11 dimensions), experimental validation is out of the question. Experimental validation would require an enormous particle accelerator; the scale of this accelerator simply cannot be imagined. Observational validation is unlikely as well: M-Theory predicts that we should observe magnetic monopoles (magnets that we have are dipole, meaning that they have a North and South end); however these have not been observed and are unlikely to be observed: they are not expected to have a very high density, meaning that the universe is too large and monopoles too few in number. Although it would be great if validated, it is highly unlikely to ever happen.

What represents poor body mechanics?

Poor body mechanics is represented by poor posture. When standing, walking, or sitting down it can be common to demonstrate poor posture which can eventually lead to injuries.

Why was the Higgs boson named after Peter Higgs?

Peter Higgs is credited with first proposing the existence of the Higgs Field, an idea that resulted in a unification of the electro-magnetic force with the weak interaction. Peter did not name the field after himself, that came later.

Does quantum physics explain the concept of omnipresence?

I'm pretty sure it doesn't, and my knowledge on the subject is pretty vast. I think you should consider the field of theology for your question.

How does the theory of quantum mechanics apply with string theory?

String theory is one of the leading candidates for a theory of everything, that is, a theory that unifies all 4 basic forces of nature, viz, gravity, the electromagnetic force, the strong force and the weak force. The last 3 forces mentioned above are described by quantum mechanics. This is the link between quantum mechanics and string theory.

ps- If you believe in watertight definitions, then quantum mechanics is all the quantum theory till Dirac's equation. I'm taking quantum mechanics as the theory of the small as such, that is, all of the phenomena of the small from Plank till the standard model and beyond.

If a person were to travel through a wormhole and survive how would it happen?

unknown

But since you've already postulated two items so far unobserved and unknown

to science ... a wormhole, and a person traveling through one ... the story is

completely in your control, and you might as well keep going and make up a

description of what happens to him.

It would depend on the size of the wormhole. One the diameter of a donut would do the traveler serious harm. One the size of a bus wouldn't.

The survivor would merely end up somewhere else.

If a photon is reflected from the mirror then the change in momentum of photon is?

Assuming the photon is reflected into the same medium it came from (so we can ignore refraction), its momentum differs only directionally, its magnitude stays the same. The directional component of its momentum vector is always pointing in the direction it's propagating.

Refraction is the means by which the magnitude component of the vector changes.

The change in momentum of photon is nh/lambda.

Is a naturally superior being the same as a supernatural being?

No, a naturally superior being is one who some people consider to be superior than others due to natural characteristics, while a supernatural being is a being whose existence or characteristics cannot be explained by science.

Looking at something let's say a chair how much of it is stuff matter visible and how much of it is non-stuff non-matter invisible or in anything what's the ratio of stuff to non-stuff?

The chair is primarily composed of visible matter, such as wood or metal. The invisible components would include the space between atoms and any energy associated with the chair, like electromagnetic fields. The ratio of stuff (visible matter) to non-stuff (invisible components) in the chair would be predominantly skewed towards the visible matter, with only a small fraction being the invisible components.

What is the fastest mach speed a human can travel and survive?

There isn't really a maximum speed (except of course for the speed of light!) a human can survive. What would kill a human is the force generated by very fast acceleration (G force). I'm not sure of the maximum number of G's a human can withstand, but in a pressurized cockpit of say a fighter plane, a highly trained pilot might be able to get somewhere between 15-20 G's (15-20 times Earth's normal gravity), although once you get that high, the plane is going to have some trouble staying together as well.

What electrons in an atom have the highest energy?

The electrons at the highest energy level are those (1 to 8 electrons) in the valence band. Ones with higher energy are unable to remain attached to the atom.

What is law of quantum energy and quantum mass?

In the universe energy, matter and go as per quantum. Energy is released in quantum of photon. Electron has a quantum mass. Proton has quantum mass. Both has a quantum charge. Neutron has a quantum mass. Speed of light is a quantum. Big bang is a quantum event essentially occurring at particular mass. It takes a quantum energy for shifting of electrons from one shell to other. In photo-luminescence light energy is released in quantum.

What is the physical significance of Fermi level?

The energy level (hypothetical) at which the probability of finding an electron (and a hole analogously) is half (0.5) is defined as the fermi level.

It acts as an aid while determining the n-type or p-type characteristic of a semiconductor material. The closer Ef is to Ec the more n characteristic the material holds.

I too questioned myself the same question while I studied this. I hope this helps.