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Chapter 15 – 3 Warm - Up

Explore the concepts of reflection and color light in this chapter, including the laws of reflection, refraction, and the formation of colors. Learn about the different types of reflection, the role of prisms in refracting light, and how the eye perceives and processes light and color. Gain insights into color blindness and the function of cones in distinguishing colors.

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Chapter 15 – 3 Warm - Up

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  1. Chapter 15 – 3Warm - Up • 1. What is a particle of light called? • 2. What type of wave has the most energy in the electromagnetic spectrum? • 3. What type of wave is in between Infrared and Ultraviolet light waves?

  2. Chapter 15 - 3 Reflection and Color

  3. Light • What you see depends on - amount of light and the color of the objects • Must reflect back to your eyes

  4. Reflection • Reflection - light wave strikes an object and bounces off

  5. Reflection of Light: • Light is modeled as a Ray – A line in space that matches the direction of the flow or radiant energy

  6. Reflection • Rough surfaces reflect rays in many directions

  7. Reflection • Smooth Surfaces reflect light in one direction

  8. Reflection: • Angle of Reflection – Angle the light is being reflected • Angle of Incidence – Angle of the light striking the surface • Law of Reflection – Angle of Incidence = Angle of Reflection

  9. The Law of Reflection • Law of reflection -angle of incidence always equals the angle of reflection

  10. Regular Reflection • Reflection of light waves from a smooth surface is regular reflection

  11. Diffuse Reflection • Reflection of light from a rough surface is diffuse reflection

  12. Refraction of Light • Refraction - change in the speed of a wave when it passes from one material to another

  13. Mirage • Mirage - image of a distant object • Produced by the refraction of light through air layers of different densities

  14. Prism

  15. Prisms • Wavelengths of visible light - range from the longer red waves to the shorter violet waves

  16. See Colors: • Colors form because they reflect the frequency of light for that color

  17. Color • Transparent – Transmit all light (Glass Window)

  18. Color • Translucent – Transmit some light

  19. Color • Opaque – Does not transmit light (Wall)

  20. ROYGBIV

  21. Colors: • Additive Primary Colors – Red, Green, and Blue • Add Colors together to form a different color • Mixing all three will make white light

  22. Colors: • Subtractive Primary Colors – Yellow, Cyan, Magenta • Combine to create red, green, or blue • Mixing all three will make black – Absence of color

  23. Colors • An object’s color depends on the wavelengths of light it reflects • White light - blend of all colors of visible light

  24. Prisms • White light - passes through a prism, refracts light twice • 1.Enters the prism • 2. Leaves the prism

  25. Rainbows • Rain droplets also refract light

  26. Light and the Eye • Light enters and is focused on the retina • Chemical reactions - convert light energy into nerve impulses

  27. Color Blindness • Cone - allows you to distinguish colors and detailed shapes of objects • Red, Green, Blue • Cones don't function properly

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