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39 Cards in this Set

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  • Back
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light
electromagnetic wave eye can detect (freq)
what kind of wave? what's diff about it?
color with shortest wavelength
violet (4 times 10 to the negative 7)
color with longest wavelength
red (7 times 10 to the negative 7)
ray
straight line that represents the path of a light beam
speed of light
3.00 times 10 to the 8 meter per second
luminous
emits light
illuminated
reflects light
luminous flux
rate at which light is emitted
lumen
unit for luminous flux
illuminance (not illuminated)
illumination of a surface
incandescent
luminous because of heat
candela
measurment of luminous intensity
measurement of light depends on ...
sensitivity of the human eye
spectrum
ordered arrangement of colors from violet to red
primary colors
red green and blue. add them and get white
secondary colors
yellow cyan and magenta. (two primary colors make secondary)
contemporary color
the color you add to another to produce white (ex- blue is the contemporary to yellow)
red and green =
yellow
red and blue =
magenta
blue and green =
cyan
complementary to blue
yellow
complementary to green
magenta
complementary to red
cyan
dye
molecule that absorbs certain wavelengths of light and transmits/reflects others
black
absence of reflected light
white
spectrum of colors (all)
primary pigment
(yellow cyan magenta) a pigment that absorbs only one color. ex= yellow absorbs blue light and reflects red and green.
secondary pigment
(red green blue) pigment that absorbs 2 primary colors. ex= red absorbs green and blue light
colors in films caused by
interference of light reflected from the front and back surfaces of the film
polarization
only lets in light from a single plane, end of parallel
diffuse reflection
uneven surface, rays reflected in many diff directions.
regular reflection
beam of light falls on a very smoothe surface and reflected rays are parallel
refraction
change in angle of light when moving from one medium into another
more optically dense
speed of light is slower
total internal refletion
occurs when light passes from a more optically dense o less optically dense at an angle so great that there is no refracted ray.
critical angle
when the refracted is 90
dispersion
separation of light into a spectrum by refraction
light leaving a prism is ________ to form a _______
dispersed, spectrum
rainbow is caused by
dispersion of a raindrop