Classified them into applied physics and pure physics?

In short Pure physics is the theoretical knowledge of concepts of physics, while applied physics is the knowledge of techniques that help to apply this theoretical knowledge to practical problems.

Pure physics is the realm of the imagination: it is the mathematics of the universe, the theories behind how and why things are the way they are. Applied physics is the science of the real world:...

Applied physics deals with real life movements while pure physics is theoretical and usually on a subatomic scale.

Applied physics is like engineering and other topics like that. What you call pure physics is the study of the motion and physical properties of matter.

Theoretical would be like proving and creating theories and applied is like engineering.