Color Absorption SE

Name: Date: Student Exploration: Color Absorption Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: absorb, primary colors, reflect, transmit, transparent Prior Knowledge Questions (Do these BEFORE using the Gizmo.) A set of primary colors can be mixed to form all other colors. The three primary colors of pigment are cyan (light blue), magenta (neon pink), and yellow. If possible, get three crayons – light blue, pink, and yellow. 1.​ What color do you get when you mix cyan (light blue) and yellow? 2.​ What color do you get when you mix cyan and magenta (pink)? green purple 3.​ As you add more colors, does the resulting color get lighter or darker? darker Gizmo Warm-up: Mixing Light In the Color Absorption Gizmo, you can mix different colors of light instead of pigments (like paints or crayons). 1.​ Observe the three primary colors of light. What are they? red, green, and blue 2.​ You can click on the lights to turn them on or off. What colors are formed by the following light combinations? Red and green light: yellow Red and blue light: magenta Green and blue light: cyan Red, green, and blue light: white 3.​ As you add more colors of light, does the resulting color get lighter or darker? lighter 4.​ How is mixing the primary colors of light related to mixing the primary colors of pigment? Mixing primary colors of light makes the resulting color lighter, while mixing the primary colors of pigment make the resulting color darker. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved Activity A: Get the Gizmo ready: ●​ Check that all three lights (red, green, and blue) are turned on. Absorption and Transmission Introduction: If light is blocked by an object, it is either reflected or absorbed. If light passes through an object, it is transmitted. Objects that transmit light without blurring are transparent. Question: How does colored glass transmit and absorb light? 1.​ Observe: Drag each shade of colored glass into the light box, one at a time. What do you notice? The transmitted light makes the same color glass. 2.​ Predict: What color of light will be transmitted by the Dark red, thick glass? Red light 3.​ Experiment: For each glass color, turn on the red, green, and blue lights separately. Record the color that results from each combination of glass and light. Glass Red light only Green light only Blue light only Dark red, thick Red Dark green Dark blue Dark green, thick Dark Red Green Dark blue Dark blue, thick Dark Red Dark green Blue 4.​ Analyze: If a color of light passed through a piece of glass, it was transmitted. If most of the light was blocked by the glass, it was absorbed. Fill in the blanks below. A.​ Red glass transmits red B.​ Green glass transmits C.​ Blue glass transmits light and absorbs green blue green light and absorbs red light and absorbs red and and blue light. blue light. and green light. 5.​ Draw conclusions: How can you predict what colors will be transmitted and absorbed by certain color of glass? You can guess transmission and absorption by a certain color of glass using the basis of the glasses color itself. The glass transmits its own color while absorbing others. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved ​ ​ Get the Gizmo ready: Activity B: ●​ Turn on all three lights. ●​ Remove all the glass from the light box. Making colors Question: How can you filter light to create different colors? 1.​ Observe: Experiment with different combinations of lights and pieces of glass. See what colors you can create! 2.​ Challenge: Try to create the following colors using the Gizmo. Use the R G B graph to see that each color matches the goal. (Hint: You don’t have to start with all three lights on.) 📷 When you solve one of the challenge colors, click the camera icon to take a snapshot, and then paste the image at the end of this document. Record your solutions below. Challenge Solution Color R G B Lights used Orange 100 50 0 impossible without glass Deep purple 70 0 70 impossible without glass Dark gray 25 25 25 impossible without glass Brown 50 25 0 impossible without glass Sea foam 0 50 50 impossible without glass Glass used 3.​ Analyze: Is there more than one way to make a particular color? Try to find at least two ways to make “sea foam.” If possible, see if your classmates found a solution that you did not. Yes, 📷 4.​ Extend your thinking: Use the Gizmo to create your favorite color. Take a snapshot of your color and paste it into your document. Describe your color and how you made it. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved ​ ​ I used the blue and green light, then put a thin, light blue glass in front. Activity C: Color analysis Get the Gizmo ready: ●​ Turn on all three lights. ●​ Remove all of the glass from the light box. Question: How much light is absorbed by different types of glass? 1.​ Observe: Compare the effects of thick vs. thin glass, and dark vs. light glass. 2.​ Form hypothesis: How do the thickness and darkness of glass affect the amount of light that is transmitted? The thick glass is twice as powerful as thin glass for every color. 3.​ Experiment: The bar graph shows the amount of red, green, and blue light measured by the probe. Use the graph to help you answer the following questions. Be sure all lights are on. A.​ How many pieces of thin, light glass have the same effect as one thick, light glass? Explain: 2 B.​ How many pieces of thin, light glass have the same effect as one thin, dark glass? Explain: 4 C.​ How many pieces of thin, light glass will have the same effect as one thick, dark glass? (Hint: More than are available in the Gizmo!) Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved ​ ​ 8 4.​ Extend your thinking: Water is just a little bit blue in color. Why does a glass of water appear to have no color at all, but the ocean is a deep blue color? The ocean reflects the color of the sky. So, the ocean looks way darker, in a house this isn’t nearly as much light to reflect off so, the water is more clear. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved