Via Public Transportation from Mainz Hauptbahnhof (main station)
Use the bus station "Hauptbahnhof" (Main Station). Buses to the university leave at the area marked Haltepunkt G. Take one of the buses with number: 54, 68 (all direction Lerchenberg), 58 (direction Wackernheim), 55 (direction Finthen) and get off at stop "Friedrich-von-Pfeiffer-Weg"(3rd stop). Don't get off at the stop "University", since then you have to cross the whole University campus, which is quite long.
Cross the Saarstrasse on the pedestrian bridge close to the bus stop and walk to the Institute
for Physics, Staudinger Weg 7 (near the Mensa), the first of the three cross-like buildings on the campus map below, marked with an arrow. Take the elevator to the 5th floor, turn left and take the corridor through the glass door. The first office to the right is where you want to go. If nobody is arround, just go one floor below, same direction at ask at the secretary's place for help.
Well, we can usally savely assume that you have a navigation system by now. In case it is broken: The Institute for Physics is located on the Mainz University Campus. Follow route A60 via "Autobahn-Dreieck Russelsheim", or, if using A63, change at "Autobahnkreuz Mainz" to A60 direction of Bingen. In both cases leave the Autobahn A 60 at exit "Mainz-Finthen", head to "Saarstrasse/Innenstadt", cross the the roundabaout "Europaplatz" (European flaggs), go straight ahead until reaching the exit "Universitaet". Stop at the main gate of the university and get a day's visitor parking permit at the entrance gate. Park next to the physics building, Staudinger Weg 7. Take the elevator to the 5th floor, turn left and take the corridor through the glass door. The first office to the right is where you want to go. If nobody is arround, just go one floor below, same direction at ask at the secretary's place for help.