The mystery of color & light ... an introduction to light refraction.This lesson for grades 3-6 uses color to illustrate light refraction refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. , thereby using artistic elements as an introduction to a science lesson. Materials: * small prism * color wheel chart * 3 1/2 inch color wheel that spins. (To make a color wheel, cut a 3 1/2 inch cardboard circle and glue white paper to one side. Divide the circle into 6 equal sections and color each section either red, orange, yellow, blue, green or purple. Pierce 2 holes in the circle's center and run 2 feet of yarn through the holes, tying the ends in a knot. Place the circle in the center of the yarn, and loop around several times, pulling outward on yarn to spin the color wheel.) Procedure: * Ask for a volunteer. Give this child a prism and send him/her to a sunny window (or shine a flashlight through the prism onto a white wall). Ask for a second volunteer and have this student spin the color wheel to see what happens. * While these experiments are going on, ask the class some questions from a corresponding worksheet. These questions could include: What are primary and secondary colors? What colors do we get when we mix two primary colors those developed from the solar beam by the prism, viz., red, orange, yellow, green, blue, indigo, and violet, which are reduced by some authors to three, - red, green, and violet-blue. These three are sometimes called fundamental colors. See under Color. See also: Color Primary together? What is another name for violet? Why does light appear to be white? How does light travel? (Explain that light travels in a straight line at 186,000 miles/second, and that by bending, or refracting re·fract tr.v. re·fract·ed, re·fract·ing, re·fracts 1. To deflect (light, for example) from a straight path by refraction. 2. light, the colors of the spectrum appear.) * Let children complete the worksheet to see if they understand the principles of color not of the white race; - commonly meaning, esp. in the United States, of negro blood, pure or mixed. See also: Color and light. * When students have finished, review the questions. With the color wheel chart as a guide, illustrate once more how primary colors combine to form secondary colors. Which six colors are part of the spectrum, and what device do we use to see these colors? Ask questions about light facts. Write all important terms on the blackboard. Resources Science for Fun Experiments, by Gary Gibson Gary Gibson is a science fiction author from Glasgow, Scotland. Publishing History To date, Gibson has only had two novels published, and is currently working on a third, Stealing Light. The Most Amazing a·maze v. a·mazed, a·maz·ing, a·maz·es v.tr. 1. To affect with great wonder; astonish. See Synonyms at surprise. 2. Obsolete To bewilder; perplex. v.intr. Science Pop-Up Book Noun 1. pop-up book - a book (usually for children) that contains one or more pages such that a three-dimensional structure rises up when a page is opened pop-up , by Jay Young 175 Science Experiments To Amuse and Amaze your Friends, by Brenda Walpole |
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