Physics is the branch of science concerned with the nature and properties of matter and energy, and their interactions.
It includes the subjects of Mechanics (motion and interaction), Thermodynamics (heat and temperature), Vibrations and Waves, Optics (light and colors), Electromagnetism, Relativity and Quantum Mechanics.
Quantum is the scientific name given to “the basic stuff from which the universe is made.” (Michael Talbot)
Scientists refer to the tiniest phenomena in the universe as “subatomic phenomena,” because it is smaller than, or occurring within, an atom.
When subatomic phenomena was found to be both particles and waves, they gave them the name “wave particle” or “quantum.” (Michael Talbot)
Quanta is the plural of “quantum.”
Quantum Mechanics / Quantum Physics
Quantum Mechanics (QM) is also known as Quantum Physics and Quantum Theory.
QM is the branch of physics that deals with the very small.
It describes motion and interaction at the subatomic level.