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That has been a topic of much debate since th1900's. There has been no fully successful tying of the two branches of physics yet but, many proposed theories have made great leaps forward to the answer. For example quantum gravity theory and the string theory, the latter being the more current and relevant.
There are two areas in which the transition from quantum mechanics to classical mechanics is rather obvious: Statistical thermodynamics and wave-particle duality.
Answer2:
Classical and Quantum Mechanics merge in Quaternion Mechanics.
Quaternion Mechanics consists of Quaternion quantities like energy
W = -vh/r + cP where -vh/r is the scalar enrgy and cP=cmV is the vector energy.
Classical and Quantum Mechanics need Quaternion quantities. In general the potential energy -vh/r is a scalar aka a Boson and vector energy cP is a vector aka a Fermion. Bosons/Scalars have integer spin and Fermions/Vectors have 1/2 integer spin.
For the most part like Newtonian Physics use only scalars -mGM/r a scalar and no vectors. Likewise, Quantum mechanics use mostly Fermions or Vectors and few scalars. The speed of light is a scalar as is Planck's Constant h.
Quaternion Mechanics merges Classical and Quantum Physics.
The Laws of Quaternion Mechanics are:
0 = XB = [d/dr, DEL] [B,B] = [dB/dr -DEL.B, dB/dr + DEL B ]
0 = X2B = [(d2/dr2 - DEL2), 2d/dr DEL] [-vh/r,cP]
This Quaternion Wave gives the
scalar/Boson wave -(d2/dr2 - DEL2)vh/r - 2d/dr DEL.cP =0
and the
vector/Fermion particle (d2/dr2 - DEL2)cP + 2d/dr DEL -vh/r =0
In Nature, Quaternions rule and Quaternions combine Bosons and Fermions.
A Quaternion can be a Boson or a Fermion or Both as in
X2W =[ -(d2/dr2 - DEL2)vh/r - 2d/dr DEL.cP,
(d2/dr2 - DEL2)cP + 2d/dr( DEL -vh/r + DELxcP) ]
Quaternions consist of Scalars and Vectors , Bosons and Fermions.
What else can I help you with?
Can you use quantum mechanics to predict outcome of a football match?
no
Why classical mechanics fails to explain Compton effect?
Classical mechanics assumes that light energy is a self-propagating, harmonic wave of electro-magnetic fields. It assumes that there is no limit to how small the energy in a light beam can be. QM, on the other hand, assumes there is a limit to how small the energy within a "chunk" of light can be, and that size is given by the frequency of the light times Planck's Constant. With this assumption, the formula for frequency shift of scattered photons as a function of angle can be easily explained. Using only classical mechanics, deriving the formula is impossible.
Careers that use quantum mechanics I know this area of physics is more theoretical than anything but are there any?
The obvious choice would be a research or academic physicist. These are professions that are primarily in the public sector meaning that you would be employed by a university or the government. As for industry, there are still some companies that employ quantum physicists but they are usually R and D departments of large technology companies. Not a lot of businesses directly employ quantum mechanics directly, but there are a lot that use the results of experiments to develop new, and improve old, technologies. Possible areas for research include superconductivity, quantum computing, particle physics and string theory. Maybe chemistry too.
What is the Difference between relativity and quantum mechanics?
Quantum Mechanics is the study of the intimate behavior of the smallest forms of particles, and their interaction amongst, with special emphasys on the emissions of energy, which is delivered in quanta, or photons. Wave Mechanics is the study of many physical phenomena that happen in a non linear and recurrent behavior, usually addressed as wave, with special emphasys in both the features of said wave, and the energy that involves specific wave phenomena.
Did Sir Isaac Newton use max planck constant first?
No, Sir Isaac Newton lived before Max Planck and the concept of Planck's constant was developed much later in the early 20th century as part of quantum mechanics. Newton lived in the 17th century and made significant contributions to classical physics, particularly in the fields of optics, mechanics, and mathematics.
What are the branches of physics under classical physics and modern physics?
The main branches of classical physics include: Classical Mechanics Electromagnetism Classical Optics Thermodynamics Fluid mechanics In modern physics, there are a lot of different fields of study including: The Special Theory of Relativity The General Theory of Relativity Quantum Mechanics. Nuclear Particle Physics Solid state physics, incuding semiconductors. Statistical thermodynamics Quantum Electrodynamics (QED) Quantum Chromodynamics (QCD) In Modern Physics, optics and electricity & magnetism have been unified, especially through the use of Special Relativity. [Three of the most important fields of Modern Physics had been left out. I have put them first , second, and third on the list. By definition, these are Modern Physics because they are products of the 20th century. Also, some very important parts of Classical Physics had been left out, such as fluid mechanics.]
How does a quantum computer work and what makes it different from classical computers?
A quantum computer works by using quantum bits, or qubits, which can exist in multiple states at the same time. This allows quantum computers to perform complex calculations much faster than classical computers. The key difference is that classical computers use bits that can only be in one state at a time, either 0 or 1, while quantum computers can leverage the principles of quantum mechanics to process information in a fundamentally different way.
How does quantum computing work and what makes it different from classical computing?
Quantum computing uses quantum bits, or qubits, which can exist in multiple states at once due to the principles of quantum mechanics. This allows quantum computers to perform complex calculations much faster than classical computers, which use bits that can only be in one state at a time. The ability of qubits to exist in multiple states simultaneously is what makes quantum computing different and potentially more powerful than classical computing.
Is it possible to use Quantum Mechanics to solve problems in the macroscopic world so that the solution approximates to the classical solution when objects are macroscopic?
Yes, but the macroscope reacts to the substance and it can explode
Can you use quantum mechanics to predict outcome of a football match?
no
What jobs use complex numbers?
electrical engineers and quantum mechanics use them.
How do quantum mechanics use complex numbers?
using contraction and expansion
Does the current periodic table make use of quantum mechanics model?
No, it is not necessary.
How do quantum computers work and what makes them different from classical computers?
Quantum computers use quantum bits, or qubits, to perform calculations. Unlike classical computers that use bits that can be either 0 or 1, qubits can be in a state of 0, 1, or both simultaneously due to quantum superposition and entanglement. This allows quantum computers to process information much faster and solve complex problems that are practically impossible for classical computers to handle efficiently.
What is the significance of the no communication theorem in the context of quantum mechanics?
The no communication theorem in quantum mechanics states that it is impossible to use quantum systems to communicate faster than the speed of light. This is significant because it sets a fundamental limit on how information can be transmitted in the quantum world, impacting our understanding of the nature of reality and the possibilities of quantum technologies.
Why classical mechanics fails to explain Compton effect?
Classical mechanics assumes that light energy is a self-propagating, harmonic wave of electro-magnetic fields. It assumes that there is no limit to how small the energy in a light beam can be. QM, on the other hand, assumes there is a limit to how small the energy within a "chunk" of light can be, and that size is given by the frequency of the light times Planck's Constant. With this assumption, the formula for frequency shift of scattered photons as a function of angle can be easily explained. Using only classical mechanics, deriving the formula is impossible.
Careers that use quantum mechanics I know this area of physics is more theoretical than anything but are there any?
The obvious choice would be a research or academic physicist. These are professions that are primarily in the public sector meaning that you would be employed by a university or the government. As for industry, there are still some companies that employ quantum physicists but they are usually R and D departments of large technology companies. Not a lot of businesses directly employ quantum mechanics directly, but there are a lot that use the results of experiments to develop new, and improve old, technologies. Possible areas for research include superconductivity, quantum computing, particle physics and string theory. Maybe chemistry too.
