Reflection and Refraction

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15 Terms

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Light Wave
A visible electromagnetic wave that can reflect and refract.
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Specular Reflection
Reflection of light from a smooth shiny surface yielding a clear image.
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Diffuse Reflection
Reflection of light from a rough surface resulting in scattering in multiple directions.
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Law of Reflection
States that the angle of incidence is equal to the angle of reflection.
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Angle of Incidence
The angle formed between the incoming light ray and the normal.
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Angle of Reflection
The angle formed between the reflected light ray and the normal.
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Normal Line
A line drawn perpendicular (at a right angle) to the surface at the point of incidence.
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Refraction
The bending of light as it passes from one medium to another.
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Medium

Any substance through which light or another wave travels.
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Bend Towards the Normal
When light moves from a less dense medium to a more dense medium.
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Bend Away from the Normal
When light moves from a more dense medium to a less dense medium.
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Transparent Material
Materials that allow light to pass through with minimal scattering.
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Opaque Material
Materials that do not allow light to pass through.
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Example of Refraction
Light bending when passing from air to glass.
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Car and Sand Analogy
Describes how vehicles and light bend when encountering different media.