[en] Synchrotron techniques employ single crystal diffraction as a standard tool in order select certain photon energies out of the broadband spectrum of continuously high intensity. A synchrotron and a laboratory experiment is introduced: using a Si single crystal both exhibit numerous diffraction spots on a flat panel detector. In case of parallel synchrotron radiation the beam's cross section is projected as a distorted and monochromatic image for each reflection. In comparison, simultaneously spatially and spectrally resolved reflections arise from divergent polychromatic primary radiation emitted by a X-ray tube. The potential of employing single crystals in a laboratory scale is discussed. (orig.)