SeeingColor
.docx
School
Lehi High**We aren't endorsed by this school
Course
SCIENCE 1040
Subject
Chemistry
Date
Dec 17, 2024
Pages
6
Uploaded by GeneralElectronKookabura34
Name:Date:Student Exploration: Eyes and Vision 1 – Seeing Color Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes.Vocabulary:absorb, cyan, magenta, primary color, prism, reflect, spectrum, secondary color, transparentPrior Knowledge Questions (Do these BEFORE using the Gizmo.) Look at the two photographs. In the top photo, red light is shining on the apple. In the bottom photo, green light is shining on the same apple. 1.What do you notice about the two pictures? one has red apple with red light, the other has a black apple 2.Why do you think the same apple looks red in one photo and nearly black in the other?because of the the different colors of lightGizmo Warm-upThe eye is one of nature’s most amazing inventions. In the Eyes and Vision Gizmo, youwill explore how the eye sees. The first lesson, Seeing Color, focuses on the light thatenters the eye.1.On the LIGHT tab, drag the white The Ugly Ducklingbook from the shelf onto the stand. Check that the Light modeis White. A.What color of light is hitting the book? whiteB.What color of light is reflecting, or bouncing, off the book?whiteC.What color of light is entering the eye?white D.Turn on Show what the eye sees. Does the eye see the book? yes2.Turn off Show what the eye sees. Click on the light to turn it off. A.Is any light reflecting off the book now? noB.Turn on Show what the eye sees. Does the eye see the book now?noReproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
Activity A: Colors of LightGet the Gizmo ready: ●Remove The Ugly Ducklingbook from the stand.●Select the Colorlight mode. Introduction:Eyes are designed to detect light. If no light gets in, the eye can’t see. In this activity, you will learn that the colors you see come from light.Question: What are the colors of light?1.Observe: The image shows white light going through a solid, triangle-shaped piece of glass called a prism. What happens to the white light?it takes over The colors you see (red, orange, yellow, green, blue, and violet) are called a spectrum. White light is actually a mixture of all colors. The prism separates white light into these colors, just like rain droplets separate sunlight into the colors of a rainbow.2.Observe: The Gizmo shows three colored lights. These colors are called the primary colorsof light. What are the three primary colors of light?red,green, and blue3.Explore: Click the blue light to turn it off. What color do you get from mixing red and green light? yellowyellow(Note: Mixing light is not the same as mixing paint.)4.Explore: When primary colors are mixed, secondary colorsare made.A.Magentais a pinkish color that looks like this: Which two colors of light combine to make magenta?red, blueB.Cyanis an aqua color that looks like this: Which two colors of light combine to make cyan?blue and green5.Observe: Now turn on the red, green, and blue lights. What kind of light is produced where all three light colors come together?whiteAt the start of this activity, you learned that white light can be separated into different colors. White light canalso be made by combining equal amounts of red, green, and blue light. These ideas will help you understand why different objects appear to have different colors.Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
Activity B: Reflected lightGet the Gizmo ready: ●With Colormode selected, turn off all three lights. Introduction: When light hits an object, several things can happen. If the object is transparent, like glass, the light will go right through it. If the light doesn’t pass through, it can either be reflected from the surface or it can be absorbedby the object.Question: Which light colors are absorbed by an object, and which colors are reflected?1.Create a hypothesis: So far, you have learned that white light is a mixture of different colors. What do you think is happening when we see a red apple?ill see a red apple, with a white light2.Observe: Drag Red Riding Hoodin the stand, and turn on the red light. A.Is the red light reflected or absorbed by the book?reflectB.Turn off the red light and turn on the green light. Is the green light reflected or absorbed by the book?absorbedC.Now try the blue light. Is blue light reflected or absorbed? absorbedD.Turn on all three lights. What do you see? the red light reflectsE.Change to the Whitelight mode. Recall that white light is a mixture of red, green, and blue light. What do you think is happening when white light hits the red book?the red light reflects3.Predict: Think about what might happen if you did the same experiment with a blue book. A.Which colors of light will be absorbed by the blue book?red and greenB.Which color of light will be reflected by the blue book? blueC.Think about a green book. Which light colors will be absorbed? red and blueD.Which color of light will be reflected by the green book?greenReproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
4.Experiment:Select the Color light mode. Experiment with the blue Blue Beardbook and the green The Frog Princebook. After you turn each color on and off, fill in which colors were absorbed and reflected by each book. Blue BeardAbsorbed:red and greenReflected:blueThe Frog PrinceAbsorbed:red and blueReflected:greenDo these results agree with your prediction?yes5.Summarize: Highlight “absorbed” or “reflected” to fill in each blank.If the light color is the same as the object’s color, the light will be _______________by the object.absorbed reflectedIf the light color is different from the object’s color, the light will be_______________by the object.absorbed reflected6.Explain: Think about the apple in different colors of light. Why does the apple appear red in red light, and nearly black in green light? reflected because its a red apple7.Summarize: In general, why do objects have color?because they absorb or reflect the lightsReproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
Activity C: Mixtures of lightGet the Gizmo ready: ●With Colormode selected, turn on all three lights. Introduction: Some colors are mixtures of light. What happens when light hits objects that are mixtures of colors?Question: How do objects that are mixtures of colors absorb and reflect light?1.Think about it: It’s a hot summer day. Your mom tells you not to wear a black shirt because you will get too hot. Why is it better to wear a white shirt than a black shirt when it is hot?black shirt absorbs, white shirt relects2.Predict: Remember that yellow light is a combination of red and green light. A.Which color do you think will be absorbed by a yellow book? blueB.Which colors do you think will be reflected by a yellow book? red and green3.Experiment: Drag Goldilocksto the stand. Turn each light on and off.Which color is absorbed? blueWhich colors are reflected?red and green4.Observe:Select Show what the eye “sees”and turn on only the red light. Why does the yellow book appear red?because red is one of the primary color it makesTurn off the red light and turn on the green light. Under green light, why does the yellow book appear green? its a primary color that makes yellow5.Predict: Predict the colors of light that will be absorbed and reflected by the cyan book and then the magenta book. (Hint: Cyan is blue-green and magenta is red-blue.)Cyan bookAbsorbed:redReflected:blue and greenMagenta bookAbsorbed:red and blueReflected:green6.Experiment: Test your prediction using the cyan book (The Little Mermaid) and the magenta book (The Three Little Pigs). Were your predictions correct? yesReproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
7.Predict: Which colors do you think will be absorbed and reflected by the white book, The Ugly Duckling? all 3 reflectedTry it out with the Gizmo. What did you find? all 3 reflected8.Predict: Which colors do you think will be absorbed and reflected by the black book, Cinderella? all 3Try it out with the Gizmo. What did you find? only the drawing and title of the book reflected9.Explain: A pure black surface will absorb allthe colors of light and won’t reflect any light. A pure white surface will reflect all the colors and won’t absorb any light. How does this explain why you shouldn’t wear a black shirt on a hot day? the sun produces heated white light and the black will just absorb it all10. Summarize: Based on what you have learned, explain why different objects appear to be different colors. because some absorb and some reflectReproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved