|
|
|
|
Code Number: 6D20.23
Demo Title: Gratings - Phase or Holographic Gratings
Condition: Excellent
Principle: Refraction and Dispersion
Area of Study: Optics, Astronomy
Equipment:
5 inch X 5 inch Holographic grating, Slit Mask, Overhead Projector, Small laser pointer with different phase gratings to screw on, Holographic Desk Display.
Procedure:
Place the slit mask on the overhead projector and the grating on the head of the projector in the exit beam. There is a piece of Velcro on the overhead to hold the grating. Turn on the overhead and you will observe a rainbow spectrum.
Place the desired grating head on the laser. When turned on, a pattern made by the grating will be projected on the wall. The patterns available are: Star, Spaceship, Hand, I Luv U, Star (points), and Spider Web.
References:
- Francisco Jose Torcal-Milla, "Diffraction of Light Through a Hummingbird's Wings", TPT, Vol. 61, #9, Dec. 2023, p. 816.
- Philip Sadler, "Projecting Spectra for Classroom Investigations", TPT, Vol. 29, # 7, p. 423 - 427, October 1991.
- Wallace A. Hilton, "W-10", Experiments in Optical Physics, p. 103.
- Jodi and Roy McCullough, "Diffraction with Rainbow Glasses", The Role of Toys in Teaching Physics, p. 4.160.
- S. F. Jacobs, "Advanced Experiments With Diffraction Gratings", Optical Sciences Center, The University of Arizona, 1996.
- "Diffraction Grating, Simple", Selective Experiments in Physics, CENCO, 1962.
- "The Diffraction Grating", Selective Experiments in Physics, CENCO, 1962.