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27 Cards in this Set
- Front
- Back
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How does visible light interact with an object?
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When light strikes an object, the light can be reflected, transmitted, or absorbed.
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Transparent materials...
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transmit most of the light that strikes it.
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A primary light source...
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emits or gives off its own light. The sun or a lightbulb.
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A secondary light source...
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reflects light from a primary source. A mirror or the moon.
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What happens when light hits a transparent material?
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The light is absorbed by particles of the transparent material, but then the particles reemit or send it back out until the light finally passes through to the other side.
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Translucent materials...
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scatter light as it passes through, just like smoke, fog and clouds scatter light. You can usually see something behind a translucent material, but it's blurry. Wax paper and frosted glass are examples.
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Opaque materials...
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reflect or absorb all of the light that strikes it. You can't see through opaque materials because light can't pass through them.
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What happens when light strikes an opaque material?
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The light is absorbed or reflected.
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What determines the color of an opaque object?
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The color of an opaque object depends on the wavelengths of light that the object reflects. It is whatever color of light it reflects.
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What are the secondary colors of light?
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yellow=red+green
cyan=green+blue magenta=red+blue |
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What happens when light strikes a translucent material?
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It scatters.
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What happens when light strikes a transparent material?
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It is absorbed then remitted. Remitted means sent back out.
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The color and brightness of an object depends...
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on the material the object id made of.
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Can objects appear to be different colors if you view them in different color light?
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Yes. An apple seen in red light will look red. The same apple seen in green light will look black because there is no red light to reflect. [pg.48 has a picture]
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What happens when you combine the three primary colors in equal amounts?
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You get white light.
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What are primary colors of light?
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The three colors that can be combined to make any other color. RED, GREEN, AND BLUE
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What are secondary colors of light?
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colors produced by combining two primary colors in equal amounts.
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What are the three primary colors of light?
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RED, GREEN, AND BLUE
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A primary and secondary color can be combined to make...
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white light.
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Any two colors that combine to make white light are called...
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complementary colors.
yellow and blue, cyan and red, magenta and green are three complimentary color combinations. |
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Pigments are...
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colored substances that are used to color other materials. Inks, paints and dyes contain pigments.
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What determines the color of pigments?
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The color of light the pigment reflects determines the color.
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How is mixing pigment different from mixing colors of light?
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As pigments are added together , fewer colors of light are reflected and more are absorbed.
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What happens to a mixture as more pigments are combined.
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The mixture looks darker.
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Cyan, yellow and magenta combined in equal amounts ...
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produce black.
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What colors are used in four color printing?
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yellow, magenta, cyan and black
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An actors blue pants and red shirt both appear black. What color light is shining on the stage?
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green
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