Hi everybody, I would like to know what would be the best angle (or best geometry) to put the detector relative to the light source in order to observe the emission radiation from the fluorescent materials? As I know the most common geometry used for fluorescence is right angle observation. Detector is placed at 90 deg to incident light to minimize the risk of transmitted or reflected incident light reaching the detector (from wiki). Why?!! If we place detector at 45 deg or at smaller angle to the source, what would be happened?