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Chapter 2: Section 2 Visible light and Color
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When light strikes an object, it is reflected, transmitted, or absorbed.
Light ON Light OFF
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What is reflecting light. What is absorbing light
What is reflecting light? What is absorbing light? What is transmitting light?
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Transparent materials transmit light
Transparent materials transmit light. You can see things on the other side of the material.
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Translucent materials scatter light
Translucent materials scatter light. Things on the other side of the material look blurry.
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Opaque material reflects or absorbs all the light that hits it
Opaque material reflects or absorbs all the light that hits it. You can’t see through it.
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What color does it REFLECT? What color does it ABSORB?
What color is the apple? What color does it REFLECT? What color does it ABSORB?
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The color of an opaque object is the color of the light it REFLECTS.
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The apple only looks red if it REFLECTS red light to your eye.
You see…. The apple only looks red if it REFLECTS red light to your eye.
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What about Black and white?
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Why can’t you see well at night?
There is very little light to reflect off objects and back to your eye. Only your most sensitive light-gathering cells are at work at night. What are they?
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Remember yesterday’s activity!
What did we investigate? What did we find out?
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What is a prism? A transparent object which reflects and transmits light
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Visible Light
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Wavelength Red shortest Violet longest
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Combining Colors- Light
Key Concept: When combined in equal amounts, the three primary colors of light produce white light. Primary colors: Red, Green, Blue Secondary colors: Yellow, cyan, Magenta Add up the primary colors = ?
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Combining Colors- Pigments
The primary colors of pigments combine in equal amounts to form black. Primary pigments: Magenta, Cyan, Yellow Secondary pigments: red, green, and blue Add primary pigments =?
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