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Friday, 13 June 2014 11:36

E2-24: UMBRA AND PENUMBRA - COLOR FILTERS

e2-24a

Additional Info

  • ID Code: E2-24
  • Purpose: Identify the source of penumbra regions.
  • Description: Combined red and green filters project nearly white light on a screen. When the foam sphere is inserted between the sources and the screen, the penumbral regions take on the color of the filter through which the light in that region has traveled, because the other color has been blocked by the disc. The umbra, where light from both sources is blocked, is nearly black.
  • Availability: Available
Read 658 times Last modified on Tuesday, 24 June 2014 13:55
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