Biophysics is generally about the study of structure, dynamics, interactions and function of biological systems in terms of physics principles,
Biophysics is a broad field that considers the effects of physical phenomena on biological materials, and the structure and function of molecules and biological structures. Medical physics is a further specialisation into the development and application of advanced physics methods for patient diagnosis and therapy.
Biophysics is generally about the study of structure, dynamics, interactions and function of biological systems in terms of physics principles, while Medical Physics is about the application of physics in medicine, including development of medical imaging modalities, using radiation to cure cancer, and investigation
The main difference between biophysics and medical physics is that biophysics deals with understanding the structure, dynamics, interactions, and function of biological systems; whereas, medical physics uses this understanding to make significant discoveries in medicine.