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Monday, 16 June 2014 11:28

L3-18: FOCUSING OF HEAT WAVES - OVERHEAD PROJECTOR

l3-18a

Additional Info

  • ID Code: L3-18
  • Purpose: Illustrate focusing of heat in a very dramatic way.
  • Description: This demonstration uses one of the old overhead projectors that focuses the light by a large parabolic mirror under the platform rather than a Fresnel lens on the platform, as seen in the image above left. The heat filter and the mirror system above the projector have both been removed. There is sufficient heat focused about two feet above the projector to burn a piece of black paper in a few seconds. Click on the picture above right to watch a video of this happening. White paper takes longer. Why?
  • Availability: Available
Read 858 times Last modified on Thursday, 03 December 2015 14:29
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