Question

what do you mean by quantum physics

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. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics

Answer 2

Heya mate
The answer is here



♢ Quantum physics deals with quantities and particles of the size of atoms and molecule and the sub atomic particles like proton, electron , neutron etc.

The physics and properties of particles of the size of nanometers and less is quite different from that of macroparticles that we can see with eyes.  These particles have dual nature - wave like nature and particle like nature

Quantum mechanics or physics or quantum theory are all referring to the same science subject.  In quantum mechanics, the physical quantities like energy, mass, charge etc. exist in discrete quantities. 



hope it helps