Publication No. 12718
Seeing Is Believing
Student Laboratory Kit
Materials Included In Kit
Seeing Is Believing African Continent cards, 4
Seeing Is Believing Apple cards, 4
Seeing Is Believing Flower cards, 4
Seeing Is Believing U.S. Flag cards, 4
Additional Materials Required
Colored pencils (red, blue, green, yellow, magenta and cyan)
Although the materials in this demonstration are considered nonhazardous, please observe all normal laboratory safety guidelines. Remind students to wash their hands thoroughly with soap and water before leaving the laboratory.
The Seeing Is Believing cards are reusable and should be stored for future use.
Answers to Questions
Before: (Students should color the image in the original colors as they appear on the Seeing Is Believing cards.)
The primary colors of light are red, blue, and green. Light enters the eye through the pupil, travels through the lens and is projected onto the retina. The retina contains light-sensitive nerves that transmit this inverted signal to the brain. Some of the nerves, the rods, detect light and dark, and the cones each detect one of the three primary colors of light. The brain interprets the image as right-side up and as a combination of these three colors and their intensity.
Bacher, Angela Bornn, et al, “Physical Science,” Prentice Hall, 1988.
Seeing Is Believing
“The function of art is to disturb. Science reassures.”
In this activity, students will magically change the “disturbing” colors of some artwork using the cone cells in their eyes. After a minute of concentration, the “true” colors of each object will appear.
The retina, a thin tissue that lines the back of the eye, contains two types of nerve cells that are sensitive to light. Rods are nerve cells that are sensitive to the amount of light present, or its intensity (light and dark). Cones are nerve cells that are sensitive to colors—each cone cell is sensitive to a primary color of light (red, green or blue).
Seeing Is Believing card
Although the materials in this demonstration are considered nonhazardous, please observe all normal laboratory safety guidelines. Wash hands thoroughly with soap and water before leaving the laboratory.
Student Worksheet PDF