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Investigate how the eyes and brain work together then create an optical illusion.
Our brain is always trying to make sense of what we see. Students research the process of sight. Examine the path that light rays travel as they are reflected from an object and reach the lens in your eyes. Learn more about the flexibility of the eye's lens that enables you to focus on things near and far, as well as to see things that you are not focusing on. Study how light hits the screen-like retina, and how that message is sent to the brain via the optic nerve.
This elaborate system of seeing can be tricked and manipulated by optical illusions. Students find information about the role of the brain in optical illusions.
Students create their own optical illusion. Cut a plate-size circle from a sheet of acetate with Crayola® Scissors. Trace the circle on construction paper.
Using Crayola Gel Markers, draw a geometric pattern on one side of the acetate. Use a straight edge to draw precise lines. The lines may be filled in or thicker, curved or straight, but they must all be part of a set pattern.
Within the traced circle on the construction paper, draw a different geometric, repeating pattern with the same precision.
Align the two circles, with the acetate on top. Poke a brass paper fastener through the middle of both sheets. Twist the acetate and watch for the optical distortions.
People around the world give thanks for their food. Celebrate a harvest of pineapples, pumpkins, or pomegranates-and sho
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