Von Guericke Effect (Colored Shadows).
P.I.R.A. #: 6F10.20
Illustrates: Color perception by the brain.
Description: Two projectors are used to get a colored square with a "white" spot in the center.
Size: 15" h x 40" w
Notes: Create a shadow in the "white" area with a small object - the brain will perceive the compliment color. Use only one colored slide and one blank slide.
Hazard: None.
Condition: Good.
Instructor Comments
