Lights & Shadows, Part 1

  • Due Dec 8, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Dec 8, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video tutorial:
http://youtu.be/kudNuSRtMKw

[PDF of Slides]

Summary:

• Shadows cast only by a directional light source are sharp and dark (pure umbra).
• Shadows cast by a point light source are also umbras but their size changes with the positions of the light, object, and wall.
• In general a shadow has both an umbra and a penumbra (partial shadow).
• Solar shadows have a penumbra.
• Spot lights have a penumbra from the use of lenses and/or enclosures.
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