Biophysics is a broadly and variably defined topic. All definitions are subject to definer bias. Perhaps the best way for us to deal with this field is to say that it's anything that includes overlap between the fields of biology and physics. The scale for these interactions range from the very small (e.g., biochemical dynamics) to the large (e.g., do elephants actually run?). You might check out various faculty and their interests to get a feeling for the breadth of folks here at SUNY Geneseo.