MRS HAWTHORNE Ch 25 pg.604 VOCAB

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light
a form of electromagnetic energy that makes things visible
incandescence
a process that makes light with heat
fuorescence
a process that makes light directly from electricity
white light
light containing an equal mix of all colors
color
the sensation created by the different energies of light falling on your eye
photon
the smallest possible amount of light, in the form of a wave-bundle
nanometer
a unit of length equal to one-billionth of a meter (0.000000001 m)
electromagnetic wave
a wave of electricity and magnetism that travels at the speed of light; light is an electromagnetic wave
electromagnetic spectrum
the entire range of electromagnetic waves, including all possible frequencies, such as radio waves, microwaves, X-rays, and gamma rays
RGB color model
a model for tricking the eye into seeing almost any color by mixing proportions of red, green, and blue light
pixel
a single dot that forms part of an image made of many dots
CMYK
the subtractive color process using cyan, magenta, yellow, and black to create colors in reflected light
lens
an optical device for bending light rays
mirror
a surface that reflects light rays
prism
a glass shape with flat, polished surfaces that can both bend and reflect light
transparent
allows light rays to pass through without scattering
light ray
an imaginary line that represents a beam of light
reflection
the process of light rays bouncing off a surface; light reflects from a mirror
refraction
the process of bending while crossing a surface; light refracts passing from air into water or back
translucent
allows light rays through them but scatters them in all directions
specular reflection
"shiny" surface reflection, where each incident ray produces only on reflected ray
diffuse reflection
"dull" surface reflection, where each incident ray produces many scattered rays
index of refraction
a number that measures how much a material is able to bend light
converging lens
a lens that bends exiting light rays toward the focal point
diverging lens
a lens that bends exiting light rays outward, away from the focal point
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