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Light Reactions 7th Grade Chapter 7
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.
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?
Absorption • Light stops at the object and does not reflect or refract. • Objects appear dark or opaque. • Example: wood
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
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).
Refraction • Light goes through the object and bends at an angle. • Example: Diamond