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Light Reactions - PowerPoint PPT Presentation

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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