The Pixel Paradox and Transition-Metal Spectroscopy:: One of Many Uses of the Handheld Digital Microscope in Chemical Demonstrations

• Ed Vitz ^[1]
  1. [1] Kutztown University

     Kutztown University

     Borough of Kutztown, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 87, Nº 3 (March), 2010, págs. 275-279
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A handheld digital microscope (HDM) interfaced to a computer with a presentation projector is used to project an out-of-focus yellow patch on the screen, then the patch is brought into focus to show that, paradoxically, there are red and green but no yellow pixels. Chromaticity diagrams are used to discuss this observation and spectroscopic examples of additive mixing. Types of HDMs and other uses of these devices are described.