Science: Middle School: Grades 6, 7 and 8 Quiz - Light 1 (Answers)
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The sun is a huge source of light. The most common light sources are thermal: a body at a given temperature emits a characteristic spectrum of black-body radiation. Examples are sunlight, incandescent light bulbs and glowing solid particles in flames.
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Light travels at almost 300,000,000 meters per second in a vacuum
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Light can travel through translucent material
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Translucent means allowing light to pass through but diffusing it so that people and objects on the opposite side are not clearly visible. A frosted window is translucent but not transparent. Tracing paper is another example of a translucent material
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A luminous object gives out light
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Concave and convex mirrors are curved
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Rough surfaces give diffuse reflection
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