TY - JOUR A1 - Möllmann, Klaus-Peter A1 - Vollmer, Michael T1 - Measurements and predictions of the illuminance during a solar eclipse T2 - In: European journal of physics 27 (2006), 1299-1314 N2 - Measurements of illuminance during a solar eclipse are presented. The data are compared to theoretical predictions, based on a geometrical model for obscuration. The model assumes a straight and uniform motion of the sun and moon as well as a spherical shape of both, i.e. it neglects any effects of limb darkening. Furthermore, the sun's disk is assumed to have homogeneous luminosity, i.e. any luminosity variations due to sun spots are neglected. Input parameters are the duration of the eclipse, the duration of totality, the impact parameter, i.e. the distance between the two trajectories of sun and moon, and the sizes of sun and moon. The model applies to all types of eclipses, partial, annular and total. Y1 - 2013 UR - https://opus4.kobv.de/opus4-fhbrb/frontdoor/index/index/docId/414 SP - 1299 EP - 1314 ER -