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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

How was planks constant discovered?

The spectrum of object glowing because of their temperature -- a phenomena called "blackbody radiation" -- was a (no pun intended) "hot topic" in the late 1800s. Because all types of matter was found to have the same spectrum at the same temperature (more or less), it was felt that understanding BBR would give insight into the basic nature of matter.

Developing an explanation for what was seen in experiments frustrated the scientific community so much that Max Planck decided to see if he could develop a mathematical explanation. He found he could mathematically explain the spectrum by assuming that the light coming from a blackbody came in discrete parts (he called them "quanta") where the energy of each quanta was equal to a constant 'h' times the frequency of that light, What he never considered was that his mathematical explanation was what actually WAS HAPPENING -- that light really DOES come in quanta. The constant that he used to derive his formula is now called "Planck's Constant," and it is a fundamental aspect of the Universe we happen to live in.

What would happen if a train were traveling at the speed of light and on top of it was a moving car?

According to Stephen Hawkings (you can watch his study on time travel to answer this question) the speed of light is like the "speed limit" for the universe. Nothing exceeds the speed of light. So if you have a train that's travelling at the speed of light (which is impossible, it can travel close but not exactly at the speed of light), and a car is moving on top of it, isn't that technically breaking the "speed limit" or exceeding the speed of light? That's not possible, instead physics would "autocorrect" that and instead of having the car move fast enough to break the "speed limit", time would be slowed down, meaning the car would be slowed down, just enough so that it doesn't break the speed limit. Simply it means, if you were inside that car, time would be passing really slowly. While a week passes for the person in the car, one hundred years would pass in regular time.

Who was the quantum theory pioneer?

The quantum theory pioneer was Max Planck, who in 1900 introduced the concept of quantization of energy, laying the foundation for modern quantum physics. His work led to the development of quantum mechanics by physicists such as Niels Bohr, Werner Heisenberg, and Erwin Schrödinger.

Who was a quantum theory pioneer?

Pioneers of modern quantum theory include Albert Einstein, Max Planck, Niels Bohr, Max Born, Werner Heisenberg, Erwin Shroedinger, Paul Dirac, Wolfgang Pauli, Richard Feynman, and quite a few other physicists and mathematicians.

Why Maxwell's equations fail in Quantum Mechanics?

I can only give you my view and everyone has a different view. Maxwell's equations shows the wave nature of light not the particle nature. A lot of this has to do with energy states of matter and possible changes in their gravity curve of their space time. This level of understanding is the leading edge to understanding the universe.

Now if you want to take a chance on proto-science go to my web site of subspacescience.weebly.com where I show matter and light as an interaction of subspaces. Two subspaces to make a particle of matter and two subspaces to make a ray of light.

How does quantum mechanics impact everyday life?

Quantum mechanics has greatly developed our understanding of physics, chemostry and the universe as a whole. For one, it has enabled scientists to uncover and explain the structre of atoms and other sub-atomic particles. Also, it gives answers to some of the problems which cannot be solved using classical physics - the Ultraviolet Catastrophe was one aspect where classical physics failed.

Wolfgang Pauli discovered the phenomenon of electron spin, Niels Bohr the structure of the orbits, and Max Planck solved the mystery of the Black Body Radiation (and the Ultraviolet Catastrophe, by quantizing energy into E=hf). Other famous quantum physicists include: Dirac, Einstein, Heisenberg, Boltzmann, Schroedinger...

Also, scientists are currently looking into constructing and designing a functional 'quantum computer' - which would be immensely powerful.

When did neils borh contribute to quantum mechanics?

Niels Bohr contributed to the development of quantum mechanics in the early 20th century, particularly through his model of the atom and the concept of complementarity. His work laid the foundation for understanding the behavior of electrons at the atomic level.

How did Heisenberg uncertainty principle challenge the Newtonian worldview?

The Heisenberg uncertainty principle challenged the Newtonian worldview by showing that it is impossible to simultaneously know both the exact position and momentum of a particle. This contradicted Newtonian determinism, which suggested that the behavior of particles could be predicted with certainty if their initial conditions were known. The uncertainty principle introduced a fundamental limit to the precision with which certain pairs of physical properties can be measured.

What are the applications of time dependent Schrodingers equation?

Being a physicist I do not know too much about the applications. But in general the time dependent Schrodinger Equation tells us how a quantum state evolves in time. I believe this might be applicable to things like flash/thumb drives, and computers in general.

How can you understand the particle in a box application of schrodingers equation in your physical world?

Well the particle in a box problem, which is described as a particle that is in a zero potential well whose walls have infinite potential. This would be like falling down a mine shaft with no way of getting out. Now what this problem helps us to understand is the probability attributes of quantum mechanics. We can find the expectation value for the position, in Dirac notation <psi | x | psi>, which will say that the most probable place that the particle is in the middle of the well (or box). Now just as an example, grab a marble and a cereal bowl (it must have a curved bottom). Now roll the marble down the side of bowl. Now glance at the bowl and look away. Make a note of where the marble is then do this a bunch of times and keep track of where the marble was every time you looked at it. If you were to plot these results you will find that even though the marble is always moving it spends most of it's time near the center of the bowl. Thus, you can accurately state that though the marble is not always at the center of the bowl the probability of it being near the center when you measure it's position (look at it) is higher than the probability of it being near the edges of the bowl! That is essentially what the particle in a box (infinite square well) problem is saying, with regards the the expectation value of position.

Sorry so long!

What does the strangeness of a quark mean?

Quarks are not strange or charmed per se. There are six different types of quarks, and each one has a different name:

  • Up
  • Down
  • Charm
  • Strange
  • Top
  • Bottom

These are just names - they do not imply that some quarks are indeed charmed while others are strange.

Each quark also has specific properties, including mass, as well as:

Color charge:

  • Red
  • Green
  • Blue

Electric charge:

  • Positive
  • Negative

Spin:

  • +1/2
  • -1/2

To read more about quarks, follow the related link below.

What is important about the uncertainty principle?

Heisenberg's Uncertainty Principle is the principle that states that the momentum and the position of a quantum particle can not be simultaneously accurately known. This means that the more precisely you know the momentum, the less you know about the position and vice-versa.

What are the different states of quantum state?

Quantum states can be in a superposition, where they exist in multiple states simultaneously until measured. They can also be entangled, where the states of multiple particles become linked regardless of distance. Finally, quantum states can collapse to a single state upon measurement, revealing a definitive value.

What is application of heisenberg principle?

The Heisenberg Uncertainty Principle states that it is impossible to simultaneously know both the exact position and momentum of a particle. This principle has significant applications in quantum mechanics, specifically in understanding the limitations of measurement precision at the microscopic level. It also plays a key role in shaping our understanding of the behavior of subatomic particles.

Why is a neutrino released during positron emission?

To preserve the conservation of; energy, momentum, and angular momentum in beta plus decay. Without the neutrino there is a measurable difference between the energy, momentum, and angular momentum of the initial and final particle. The neutrino rectifies this difference and it's existence was actually postulated before it was ever discovered!

What is laser driven fusion?

The light emitted by a laser has an associated energy (Energy = Plank's Constant(times)frequency of the light => E=h*f). If the energy is high enough coupled with amplification techniques this energy can be utilized the induce fusion of the fuel. The fuel can be Deuterium-Deuterium, Deuterium-Tritium, Deuterium-Helium(3), or Hydrogen-Boron. The fusion of these atoms leads to product atoms and the release of energy.

When did werner heisenberg discover the quantum theory?

Werner Heisenberg developed the quantum theory in 1925 as part of his work on matrix mechanics. His groundbreaking research contributed to the foundation of quantum mechanics and earned him the Nobel Prize in Physics in 1932.

Are you constantly surrounded by low frequency X-rays?

No, I am not constantly surrounded by low frequency X-rays. I am a computer program that does not have a physical presence or the ability to interact with X-rays.

How do you derive graphene's low-energy Hamiltonian?

To derive graphene's low-energy Hamiltonian, one typically starts with the tight-binding model for graphene's honeycomb lattice. By applying the nearest neighbor approximation and using certain symmetry properties, one can simplify the model to focus on the low-energy excitations around the Dirac points in the Brillouin zone, leading to a 2x2 matrix Hamiltonian that describes the electronic properties of graphene near the Fermi level.

Why electric field breaks the space-inversion symmetry while magnetic field breaks the time-reversal symmetry?

Electric field breaks space-inversion symmetry because it changes the sign of charges under spatial inversion. Magnetic field breaks time-reversal symmetry because reversing the direction of time changes the direction of the field's rotation or flux lines.

Can you become a physicist with a GED if you work very hard?

Yes, it is possible to become a physicist with a GED if you apply yourself and work hard. Many universities and colleges offer pathways for students with non-traditional education backgrounds to pursue a degree in physics, provided they demonstrate a strong aptitude and dedication to the field. Additional education and research experience may be necessary to compete with candidates who have completed a more traditional academic path.

Will the focal length of a concave mirror increase as the wavelength increases?

According to all the laws of optics, no, but there's more to it. If the mirror is of

relatively low quality, especially if the reflecting coating is on the back and the

light has to pass through the glass twice when it bounces, then the focal length

may be slightly different for different wavelengths. The result is that you see

thin borders of color around objects when you look at them in the mirror. This

is considered a cheapo mirror with a severe fault. It might be OK to shave with,

but it would never be used in an optical system like a telescope.

Why the colors are visible to human eyes?

The colors give the body energy.. Most colors have various amount if light in them coming from a rod of invisible energy. The energy in these colors is what helps us ejaculate during mating occasions. nah im bsing

Who is the inventor of quantum theory?

Max Planck is often credited as the founder of quantum theory. He introduced the concept of energy quantization in 1900, which led to the development of quantum theory by other physicists such as Albert Einstein, Niels Bohr, and Werner Heisenberg.