Question

what is quantum mechanics?

Answer 1

The branch of mechanics that deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave particle duality, the uncertainty principle, and the correspondence principle.

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Answer 2

hi friend
here's your answer looking for

QUANTUM MECHANICS :- QUANTUM MECHANICS IS BRANCH OF SCIENCE THAT DEALS WITH THE BEHAVIOUR OF ATOM.
This is one of the most weird branch of science in which you are never sure about the position or momentum at same time.
Even it is not the branch that deals with only atom but it also deals with all the particle that are really small or studied at the quantum level.

what makes the quantum mechanics one of the weird science?

Answer:- According to the classical physics you can be sure about the position and the momentum of the object but in quantum mechanics on the laws of classical mechanics doesn't work. so in quantum mechanics We Are Never sure about the position and the momentum at the same time.

even, one of the most weird thing about it is that" one object may be at two or more place at a time"

Now, you might be thinking why and how the object can be at two places at a time? actually according to the quantum mechanics , any article Quantum particle shows the particle nature as well as wave nature. That's is what called wave particle duality.

so any matter that we are seeing around us, is the particle as well as wave. and waves are those which may spread throughout the space. and that is only the reason why on the matter can be at two places at a time.

now the quantum mechanics has also given the name to this weird nature. this name is termed by superposition.
even, the teleportation in be also possible by the quantum mechanics.

and this branch can also explain why the matter exist and how they exist through out the space.

there was a Theory that States why the matter exist!
this theory is called as Quantum Field theory. basically according to this theory there are the fields of various particle such as the electron field, Higgs field, quark field. and when the energy is provided to these fields then they form some ripples in it. and these ripples create that particle of that particular field in the space. and this theory is termed nothing else other than Quantum Field theory.

now the question arises that why we are not able to observe the wave nature around us if all matter are in the form of waves.
according to de Broglie wavelength equation, the wavelength is inversely proportional to the mass and the velocity hence it is inversely proportional to the momentum of that object. hence all the object around us have very much Mars as compared to the quantum particles. so there wavelength is too small to detect or observe. that is the only reason why we are not able to see the wave nature of all the matter around us except Quantum particles.

the experiment that states that only matter around us , shows wave nature as well as particle nature is the young double slit and the photoelectric effect.

in a young double slit experiment, great scientist Thomas young pass the monochromatic light through the single slit. during this the light shows the particle nature. but when he passes the monochromatic lights To the double slit then hips of that they shoes the interference. that is only shown by any wave.

so why this experimented of prove that light is in the form of wave as well as particle.

hope you are satisfied with my answer