Question

what is quantum physics?what it shows?give example:

Answer 1

Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. 


Erwin Schrödinger made an example of quantum mechanics, often called Schrödinger's cat.

Answer 2

Quantum mechanics, including quantum field theory, is a fundamental theory in physics which describes the nature at the small scales of energy level of atoms and subatomic particles. Classical physics, is the physics existing before quantum mechanics, describes nature at small scale.

Quantum physics shows the Quantum theory is theoretical basis of modern physics that explains the nature and behavior of matter and energy at that level is sometimes reffered to as quantum physics and quantum mechanics.

For Example, a single electron in an unexcited atom is pictured classically as a particle moving in a circular trajectory around the atomic nucleus, whereas in quantum mechanics it is described by a static, spherically symmetric wave function surrounding the nucleus