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Light and Color: Reflection and Color Mixing Science Podcast

Join us for the latest episode of the Science podcast on light and color principles, covering topics like reflection patterns, color addition and subtraction, and more. Prepare for the final exam and explore the fascinating world of color science.

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Light and Color: Reflection and Color Mixing Science Podcast

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Presentation Transcript

  1. 12/2/13Light and Color • Science podcast: Escaped Star • Final Exam, next Monday 8-10 am in SCI 111,this room. The test objective sheet is on the course website. We’ll review on Thursday. • Reminder to do online course evaluation • Finish color • Start reflection • Optional notebook submission tomorrow • Homework: worksheets Light reflection, Specular vs. diffuse reflection , associated readings

  2. Learning objectives • Use the color wheel to predict the result of adding colors • Use the color wheel to predict the result of subtracting colors • Compare/contrast the reflection patterns of a smooth and a rough surface.

  3. Color • Go over Color Addition and Subtraction, Viewed in Another Light at your tables. • Reinforce findings with color filter demos • Go to RGB Lighting http://www.physicsclassroom.com/shwave/lights.cfm • Explain what you see with each color combination turned on (R, B, G, RG, RB, GB, RGB) • Go over the mathematics of color using the color wheel

  4. Reflection • Specular reflection occurs on a smooth surface such as a mirror • Diffuse reflection occurs on a rough surface such as wall

  5. Law of Reflection • Angle of incidence equals angle of reflection • The angle is measured from an imaginary line drawn at a right angle to the surface • For a smooth surface, every part of the surface has the same normal line • For a rough surface, neighboring areas have different normal lines. This law applies to all reflective surfaces.

  6. Diffuse Reflection • For each section of the surface, the angle of incidence equals the angle of reflection. • There is minimal glare with diffuse reflection because the light is scattered over a larger region. This is why it is easier to read from rough paper than smooth paper Discuss Light Reflection and Specular vs Diffuse reflection worksheet

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