# Lab 7 - Experiment 7-1(Addition of the Colors of Light...

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Experiment 7-1 (Addition of the Colors of Light) Objective : To demonstrate colors of light. Results, Explanations, Conclusions : For this experiment we examined a TV screen closely, from within a few inches, and noticed the color pattern. The three colors that actually appeared on the screen were blue, green, and red. The pattern seemed to consist of vertical lines with black in between in the lines. These three colors are used to create all of the colors that are seen when viewed from a few feet away by mixing all the colors together. When mixed and standing further away it creates all of the colors. White is the mix of all colors whereas black is the absence of color. The differences between primary colors of light and paint are that the primary colors for paint are red, yellow, and blue. Whereas the primary colors for light are red, green, blue. Also in paint black is the mix of all colors and white is the absence of colors. In light black is the absence of color and white is the mix of all colors. Teaching Applications : -“Wheel of Color”: For this experiment have the children create their own light and paint wheels. When they make them have them put on both their primary colors and discuss the differences in them. Also have them out on each wheel black and white and discuss the differences in them on both the paint and light wheel. By doing this the children should come to a better understanding of colors of light and how they are different from other colors. -“Flash of Colors”: In this experiment take colored filters and shine a flashlight on them. Have a whiteboard behind them so that the light will shine through and onto it. Mix the colors on the filters together. By doing this you will demonstrate how you can create all all colors by the primary colors of light: red, green, and blue. This will give the children more knowledge of how the colors if light work. Diagram :

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Experiment 7-2 (Electromagnet) Objective : To demonstrate how electromagnets work. Results, Explanations, Conclusions : For this experiment we stripped the ends of wire to leave them bare. Then we wrapped the wire tightly around the nail in several turns, about ten. We then attached the wire to the poles of the battery while using enough wire so that we could maneuver the parts of the circuit easily. Then we turned the electricity on and placed the nail among the paper clips. We then tried it again without the electricity. Again we wrapped another ten turns around the nail and tried it again. Then we did it again with twenty more turns or so. We disconnected the circuit when the wire gets warm, and tried the same thing by wrapping wire around a pencil. When the current was on and we placed the nail among the paper clips it picked up the paper clips and stayed magnetized. When the current was off and we placed the nail among the paper clips it didn’t work and the nail picked up no paper clips. When we increased the number of turns it picked up the paper clips easier and picked up more of them. We can quantify the size
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Lab 7 - Experiment 7-1(Addition of the Colors of Light...

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