6D20.47 - Gratings - Babinet's Principle

See paragraph one in the procedure section.
Code Number:
6D20.47
Demo Title:
Gratings - Babinet's Principle
Condition:
Good
Principle:
Home Made Diffraction Gratings with Wire or Hair
Area of Study:
Optics
Equipment:
Diffraction grating, special transparency plate with slit and slat.
Procedure:

Put the diffraction grating on the head of the overhead projector.  When you put the special transparency plate on the overhead and turn it on you will have a spectrum of the primary colors on the top and the secondary colors directly underneath.

References:
  • C. Hanisch, M. Ziese, W. Oehme, "Newton's Green and Goethe's Purple - Color Experiments With LEDs", TPT, Vol. 59, #9, Dec. 2021, p. 713.
  • Akira Hitachi, Momo Takata, "Babinet's Principle in the Fresnel Regime Studied Using Ultrasound", AJP, Vol. 78, # 7, July 2010, p. 678. 

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