What is the Difference between relativity and quantum mechanics?

Answer 1

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.

Answer 2

Newtonian physics involves phenomena the size of an atom or larger. Quantum Mechanics takes over when things get smaller. In Newtonian physics it could take 16 minutes or longer to send a message to Mars over the radio. A message can go no faster than the speed of light. You would ask your question and get your answer 32 minutes later. Using quantum mechanics, it would theoretically be possible to put a manmade satellite halfway between the earth and mars. It would send a stream of light through a prism to both the earth and mars. The people on the earth and mars could use that light through the quantum mechanical process called entanglement to talk to each other just like people talk to each other on phones on the earth. Subspace anyone?

Answer 3

Molecular machanics and Quantum machanics are very different things.

Molecular machanics deals with atoms and matter at the molecular scale, a combination of molecules, eg; H2O and HCl. This is usually aplied for large clusters of atoms.

Quantum machanics, as a very simple explenation, deals with how atoms react with each other, and other matter on a very small scale, one, two atoms or less. And is a hell of a lot more complecated.

Answer 4

Relativity has two parts: General relativity and special relativity, general relativity describes gravity as a geometric property of spacetime and special relativity is the physical theory of measurement in inertial frames of reference. Now quantum mechanics, in it's wave formulation, deals with describing things on the atomic scale as a wavefunction.

Answer 5

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.

Quantum Mechanics or Quantum Physics refers more to the physical laws which govern the quantum world of all quantum phenomena, and even applied to that world before we had developed the quantum theory with all the mathematics and equations to describe the quantum world. It parallels the meaning of the term Classical Physics.

Answer 6

in quantum mechanism the energy of the photon electron vary with the frequency but independent of the intensity of the incident radiation while in classical mechanism the energy of the photon-electron should vary with intensity but should be independent of the frequency.

Answer 7

Statistical mechanics studies many particle systems in which only macroscopic quantities can be measured, quantum mechanics study dynamics of one or several elementary particles in which each measurement outcome is not deterministic but it is probabilistic. Both theories are probabilistic, but while statistical mechanics is based on classical probabilities, quantum mechanics has a peculiar probability structure (it is defined on probability amplitudes) that allows for the wave-particle duality.

Answer 8

classical mechanics deals with very large particles but in quantum mechanics very minute particles.

Answer 9

Energy and momentum are quantized. They can only take on discrete values. There are some other differences too. :)