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27 Cards in this Set
- Front
- Back
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optics
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the study of how light behaves
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light ray
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an imaginary line that represents a thin beam of light
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converging lens
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bends rays so that the light rays come together to a point
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diverging lens
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bends light so it spreads light apart instead of coming together
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prism
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an optical device used to refract and reflect light in precise ways; prisms can be used to separate white light into its component colors by dispersion
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translucent
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an object that allows some light to pass through it, but the light is scattered into many directions.
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transparent
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materials that allow light to pass through
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specular reflection
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a ray of light that strikes a shiny surface
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diffuse reflection
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the scattering of light many directions off a non-shiny surfaces
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reflected ray
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the light ray that bounces off the mirror
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incident ray
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the light ray that strikes the mirror
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normal line
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imaginary line that is perpendicular to the surfaces of the mirror
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angle of incidence
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the angle between the incident ray and the normal line
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angle of reflection
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the angle between the normal line and the reflected ray
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law of reflection
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the angle of incidence equals the angle of reflection
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ray digram
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an accurate drawn sketch showing how light rays interact with mirrors, lenses, and other optical devices
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index of refraction
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measures the ability of the material to bend light
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angle of refraction
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the angle between the refracted ray and the normal line
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total internal reflection
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when the angle of refraction becomes greater than 90 degrees
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critical angle
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the angle of incidence at which the angle of refraction is 90 degreess
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fiber optics
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thin glass fibers that use total internal reflection
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dispersion
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how refractive index varies depending on the color of light
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object
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real physical things that give off or reflect light waves
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image
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pictures of objects that are formed in space where light rays meet
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virtual image
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light rays that do not actually come together to form the image
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optical axis
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an imaginary line that goes through the center of the lens
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focal point
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rays that enter a converging lens parallel to its axis bend to meet at a point
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