The application of in situ laser spectroscopic techniques in a surface force apparatus represents a novel approach which will provide new knowledge of the molecular behavior in thin films between solid surfaces, In this feasibility study fluorescence recovery after photobleaching (FRAP) has been employed to directly measure for the first time the molecular mobility in surfactant monolayers confined between two solid surfaces. The significant potential which laser spectroscopic techniques offer for studies of surface, adhesion, and frictional forces is also briefly discussed.