Diffraction grating
Diffraction grating

 

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.
  • H. F. Webster, "A Demonstration of Babinet's Principle Using Two-Dimensional Gratings", AJP, Vol. 39, #1, Jan. 1971, p. 123.
  • C. L. Andrews, "Demonstration of Babinet's Principle", AJP, Vol. 39, #1, Jan. 1971, p. 122.