4B40.45 - Infrared Radiation/Absorption

Code Number:
4B40.45
Demo Title:
Infrared Radiation/Absorption
Condition:
Good
Principle:
Radiation and absorption of Heat from Different Surfaces
Area of Study:
Heat & Fluids
Equipment:
Postcard Liquid Crystals with half of the back side painted black and half painted silver, Infrared Heat Lamp or Hot Plate with aluminum top.
Procedure:

Heat the cards up under the lamp until all of the color is gone from the card.  Let cool and watch which side cools fastest.  Hold the card over a large heat source and see which side heats up fastest.

References:
  • Dennis Fung, "The ‘Chocolate Experiment’ – A Demonstration of Radiation Absorption by Different Colored Surfaces", TPT, Vol. 53, #9, Dec. 2015, p. 545.
  • Fred T. Pregger, "Shady Thoughts", TPT, Vol. 27, #9, Dec. 1989, p. 646.
  • Dena G. Russell and Richard A. Bartels, "The Temperature of Various Surfaces Exposed to Solar Radiation: An Experiment", TPT, Vol. 27, #3, Mar. 1989, p. 179.
  • H-180: "Absorption by Painted Surfaces", DICK and RAE Physics Demo Notebook.
  • Charles Taylor, "Demonstration 1.14", The Art and Science of Lecture Demonstration, p. 30.
  • "Give and Take", Exploratorium Science Snackbook, p. 52 - 56.
  • Ron Hipschman, "Give and Take", Exploratorium Cookbook II, p. 125.1 - 125.4.
  • Yaakov Kraftmakher, "1.18, Kirhhoff's Rule", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 68.


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