I didn't know if i should put this under physics or biology but what are some appelacations of Bio physics and what exactally is it?
Biophysics is a very, very broad field that different people will define differently. In general, there are two broad (non exclusive) definitions of biophysics:
1) Using and developing tools from physics to study biological systems. Things in this category include medical imaging, structural biology, and single molecule biophysics.
2) Approaching problems in biology in a quantitative, theoretical manner. Fields under this category include systems biology, bioinformatics, and computational neurobiology.