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39 Cards in this Set
- Front
- Back
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Chapter 22
Photoreceptors |
highly specialized, light sensitive cells in the retina of the eye
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CMYK color process
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another name for the subtractive color process that uses cyan, magenta, yellow, and black pigments
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Fluorescent
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process of using electrical energy to energize atoms, causing them to release light
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Additive primary colors
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red, blue, and green
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Subtractive primary colors
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yellow, magenta, and cyan
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Subtractive color process
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process that creates color by subtracting colors from white light using absorption
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Intensity
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measure of the amount of light energy per second falling on a surface
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Cones
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photoreceptors cells in the eye that respond to color
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White light
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combination of all the colors of light
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Additive color process
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process that creates color by adding color energies together
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Incandescent
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process of creating light with heat
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Color
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perception of the energy of light
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Rods
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photoreceptors cells in the eye that respond to differences in intensity
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RGB color process
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additive color process that uses red, green, and blue light
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Chapter 23
Dispersion |
describes the variation in the refractive indices of different colors of light
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Reflected ray
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light ray that bounces off a surface
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Law of reflection
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states that when a light ray reflects off a surface, the angle of incidence is equal to the angle of reflection
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Converging Lens
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a convex lens that bends light rays as they come together
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Fiber Optics
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thin glass fibers that use total internal reflection to carry light
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Diffuse reflections
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scattering of light into many directions off a non-shiny surface
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Virtual image
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forms when rays of light appear to be coming together, but don't actually come together; virtual image can't be projected on a screen
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Index of refraction
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ratio that gives a measure of a materials ability to bend light
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Incident ray
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light ray that strikes a surface
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Focal length
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distance from the center of a lens to the focal point
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Specular reflection
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reflection that occurs off smooth surfaces; the light rays are not scattered, and the reflected image is undistorted
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Normal line
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imaginary line drawn perpendicular to the surface of a mirror
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Chapter 24
Spectrometer |
device that that spreads light into its different colors
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Photons
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small bundles of light energy described by quantum theory
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Diffraction grating
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an optical device with a series of thin, parallel grooves that creates an interference pattern of light
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Visible light
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type of electromagnetic wave with a wavelength between 700 and 400 nm; includes all the colors of light the human eye can see
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Polarizer
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device or material that polarizes light by allowing light of only one polarization through
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Photoluminescence
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releasing of stored light energy
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Ultraviolet radiation
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electromagnetic waves with a wavelength shorter than visible light but longer than X rays; can't be seen by the human eye; have high enough energy to remove electrons and break chemical bonds
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Gamma rays
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electromagnetic waves with wavelengths of less than 0.001 nm; high energy photons emitted spontaneously in nuclear reactions
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Polarization
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the separation of the positive and negative charge in an object's atoms due to the effect of an electric field
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Electromagnetic Spectrum
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entire range of electromagnetic waves, including all possible frequencies
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Electromagnetic waves
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type of wave consisting of oscillating electric and magnetic fields that move at the speed of light
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Science
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science
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science
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science
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