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Light Reactions

In this chapter, we explore the fascinating world of colors and light reactions as seen in the natural environment. The colors of objects result from their interactions with light—whether through absorption, reflection, or refraction. We'll discuss how light can be transmitted, absorbed, and reflected, influencing how we perceive colors. Examples include the dark appearance of wood, the reflections on smooth glass surfaces, and the bending of light through diamonds. Join us as we uncover the science behind light and color phenomena.

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Light Reactions

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  1. Light Reactions 7th Grade Chapter 7

  2. Colors in the world • The color of the objects we see in the natural world is a result of the way objects interact with light. When a light wave strikes an object, it can be absorbed, reflected, or refracted by the object. All objects have a degree of reflection and absorption.

  3. Light Affects • In the natural world, light can also be transmitted by an object. That is, light can pass through an object with no effect. • Can you think of an example?

  4. Absorption • Light stops at the object and does not reflect or refract. • Objects appear dark or opaque. • Example: wood

  5. Reflection on a Smooth Surface • Light bounces off the surface of a material at an angle equal to the angle of the incoming light wave • Example: glass

  6. Reflection on a Rough Surface • Light waves bounce off at many angles because the surface is uneven. • Example: the Earth (that’s why the sky is blue).

  7. Refraction • Light goes through the object and bends at an angle. • Example: Diamond

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