what exactly is quantum physics??????????

Question

i hardly get ne of this but im really interested .so please help me

Answer 1

Hmmm...
Interesting question. Did you say ‘exactly’? Well word ‘exactly’ in not an appropriate word in the context of Quantum Physics.

What is Physics and what is Quantum Physics(QP)?

Physics was always on the minds of humans, even before they were humans who began to use tools and later began to make them. Then came the people, like Archimedes, who where able to explain how basic machines work (lever and pulley) and even the phenomena like buoyancy became quantifiable. Almost two thousand years later comes Newton and gives the world his equation for gravity. This equation showed how masses and more exciting the celestial bodies attract each other. BUT he did not explain gravity.

As people looked into the nature of macro world they also looked into the micro world. The micro world did not behave the same way as the macro world. The macro world being the world of the celestial bodies as the micro world being the world of the atoms. Curiously enough the atoms did resemble planetary systems however they behaved differently. There were different forces at work and scientists noticed that these forces reflected in their peculiar behavior. The electrons, which moved around the nucleus of the atom, did not smoothly moved from one orbit into the other but literally jumped from one level to the next. As electron picked up a packet of energy called quantum, it would jump a level and when it would give up a quantum of energy it would go down a level. Strange behavior, is it not? How about quanta being a particle and a wave at the same time? Sounds weird? Welcome to the world of quantum mechanics.

Quantum Mechanics or Quantum Physics has its own set of rules suggesting a behavior governed by probability. Early in the game Einstein protested this none deterministic approach by saying that God does not play dice with the Universe. To which Niels Bohr jokingly replied that Albert should not tell god what to do.

Einstein tried to merge these worlds of micro and macro into theory he called Unified Theory, but that is another story.

I hope that helps.

Answer 2

Quantum theory is a theory of physics that uses Planck's constant. In contrast to classical physics, many of the variables in a quantum theory take on discrete values. The quantum was a concept that grew out of the realisation that electromagnetic radiation came in discrete packets, called quanta. The process of converting a classical theory into a quantum theory is called quantisation and is divided into stages: first quantisation, second quantisation, etc depending on the extent to which the theory is quantised.


Quantum physics is the set of quantum theories. There are several of them:

* quantum mechanics -- a first quantised or semi-classical theory in which particle properties are quantised, but not particle numbers, fields and fundamental interactions.

* quantum field theory or QFT -- a second or canonically quantised theory in which all aspects of particles, fields and interactions are quantised, with the exception of gravitation. Quantum electrodynamics, quantum chromodynamics and electroweak theory are examples of relativistic fundamental QFTs which taken together form the Standard Model. Solid state physics is a non-fundamental QFT.
* quantum gravity -- a third quantised theory in which general relativity (i.e. gravity) is also quantised. This theory is incomplete, and is hoped to be finalised within the framework of a theory of everything, such as string theory or M-theory.

Answer 3

incredible volumes of texts have been written about quantum Ithe very small. Nothing is exact in the quantum realm. Particles are never measured as precise as we seem to measure regular every day objects. I would search for names like heisenberg, schrodinger, and bohr to try and get a basic understanding

Answer 4

physics which is noncommonsense