Lab 11 Color done Vision (Fall 2021)

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Laredo College *

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115

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Electrical Engineering

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Dec 6, 2023

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5

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Name: Lucero Puente INSTRUCTIONS: (1) Download this lab document and type out answers on the space provided for then save your answers. (2) If the spacing automatically moves, adjust so that your answers are not all over the place. (3) Upload this document, with your answers on it, on the designated Lab 11 Dropbox on Canvas Lab Reports/Module Tab. (4) If possible, ALL answers must be in green font or highlighted in yellow background with black font . Grading Policy for Lab Reports WITH Pre-/Post-lab Questions Grading Policy for Lab Reports WITHOUT Pre-/Post-lab Questions Completeness and accuracy of answers (with required screenshots) for the: 1. Warm-up and lab activities – 70% 2. Pre-/Post-lab questions – 10% 3. Conclusions and real-life applications – 20% Completeness and accuracy of answers (with required screenshots) for the: 1. Warm-up and lab activities – 80% 2. Conclusions & real-life applications – 20% This lab uses the Color Vision simulation from PhET Interactive Simulations at University of Colorado Boulder, under the CC-BY 4.0 license. Purposes/Objectives: In this lab, you will be able to: 1) describe the color of light that passes through different colored filters. 2) determine what color the person sees for various combinations of red, green, and blue light. Procedure: A. Develop your understanding: 1) Click the link below (hover mouse on the link then press at the same time: ctrl and left click ) https://phet.colorado.edu/sims/html/color-vision/latest/color-vision_en.html 2) Once Color Vision PhET Sim opens, your screen should look like the one below. Lab 11: Color Vision © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics
3) Explore the Single Bulb and RGB Bulbs screens or tabs . The circular orange button at the bottom right corner of each tab is the Reset button. What did you discover? Write your answers below. Also, paste below screenshots to support your answers. B. Explain your understanding: 4) Open the Single Bulb screen or tab. Explore and develop your own ideas about how filters affect how we see light. Activate the filter glass by moving the slider to the right. The filter glass slider is located above the Filter Color on its left. You can also change the Filter Color by moving the slider back and forth. Describe below (some of) your explorations/experiments and your observations with captured image or screenshot from the simulation. To turn on light, click on the red button of the flashlight. She is only able to see color when it hits the green/yellow It all has to be in the same color In order for her to see color . Lab 11: Color Vision © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics
5) In the image below, light is displayed as particles called photons . Using the PhET sim, the photons are activated by clicking the control panel just below the red flashlight switch . Research to find out what photons are and then explain in your own words why they can be useful for modeling light. (Cite references, as appropriate.) C. Demonstrate your understanding: 6) As you answer the questions below, explain also in your own words, why your answer makes sense and provide evidence from your #4 & #5 experiments/activities. Add more experiments/activities to #4 & #5, if you need better results or evidence. a) What colors of light would you see if you look through the filter with rose colored glasses? Activate the filter glass by moving the slider to the right. The filter glass slider is located above the Filter Color on its left. You can also change the Filter Color by moving the slider back and forth. Photons are basically tiny packets of energy. Many properties of light like diffraction of light required the use of wave theory She will start seeing color or slightly seeing color towards the end of blue beginning of purple Lab 11: Color Vision © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics
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b) If you are wearing blue sunglasses (this is similar to the use of blue filter in the lab activity), what colors would you see if you look at a stop light which is red, yellow, and green at different times? D) Extend your understanding: 7) Open RGB Bulbs screen/tab, then explore to develop your own ideas about how light mixes. When you activate the color sliders on the right, your screen should look like the one below. Pay attention to the color displayed behind the head of the person. The color display is what the person perceived as color combinations. . Describe some of your experiments and your observations with captured image or screenshot from this PhET simulation. If only the red and green light are hitting her she will be seeing dark yellow Magenta for red light, white for yellow light and cyan for green light Lab 11: Color Vision © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics
E. Explain your understanding/Postlab Questions: 8) Why do you think the photon model is used in the screen for #7? 9) Write below a question you could ask a fellow student or your sibling to test their understanding of Learning Objective or Purpose (2) on page 1. To easily show when the particles hit the human eye and how they become mixed What is important for color vision Conclusions: Write a summary (explanations) of the physics concepts learned based from the results of the lab experiment. Elaborate. Provide real-life applications/examples. In this lab I learned how color vision works. It was incredibly amazing how color vision is important in our lives. How exactly the color vision works in in our lives and how the light reflects and what it allows us to see once the light hits our eyesight. Although we are able to see all different type of colors and know what color is what, it amazes me how important it is see how the colors that have to come together in order for us to be able to see exactly the colors that the object appears as or the light reflecting it. Lab 11: Color Vision © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics