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Friday, 13 June 2014 11:35

E2-23: UMBRA AND PENUMBRA - EXTENDED SOURCE

Additional Info

  • ID Code: E2-23
  • Purpose: Show umbra and penumbra with an extended source, as in an eclipse.
  • Description: Hold the foam ball between the extended source (an incandescent-based television lightbox) and a projection screen (In the lecture halls, use the whiteboard behind the blackboards.). The shadow will consist of three distinct regions: (1) The umbra, in which all of the source is shadowed, is the dark central part. (2) The penumbra, where part of the source is shadowed, is the intermediate band around the umbra. (3) The outer region, where none of the source is shadowed, is the brightest region.
  • Availability: Available
  • Loc codes: E2, LS1
Read 805 times Last modified on Thursday, 31 August 2017 15:14
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