5
The term modern physics refers to the post-Newtonian conception of physics which deals with the underlying structure of the smallest particles in nature (quantum mechanics), as well as a rigorous understanding of the fundamental interaction of particles, understood as forces.
Added 12/24/2014 4:02:56 AM
This answer has been confirmed as correct and helpful.
Confirmed by
selymi [12/24/2014 7:57:49 AM]