32 terms

Abeka Physics Chapter 18

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Terms in this set (...)

camera obscura
term for a device that was long used to observe eclipses; a dark chamber into which light is admitted through a narrow aperture in one wal
Alhazen
Arab scholar often regarded as the father of scientific optics; the first to clearly state that light actually comes to our seeing eyes from objects illuminated by a source
rectilinear propagation
term for light's property of traveling in a straight line
corpuscles
term for the streams of particles that made up light, according to Newton
interference
term for light's property of alternating bright and dark bands when a light is shone through two adjacent pinholes
waves, wavelike
Since interference is exhibited by _____ not by moving particles, Young argued that light must be ______.
infrared rays
term for invisible rays that have a frequency below the frequency of red light (have long wavelengths and low frequencies)
ultraviolet rays
term for invisible rays that have a frequency beyond that of violet (have short wavelengths and high frequencies)
color
term for our perception of the frequency of light
ROY G. BV
the mnemonic device for the six colors of light that can be distinctly seen
solar spectrum
term for the six colors of light, which are obainable from the white light of the sun
monochromatic
term for light of a single frequency or within a narrow range of frequencies corresponding to the same color
composite light
term for two or more monochromatic lights that are mixed
additive mixing
term for blending two or more kinds of monochromatic light
white
the sum of all colors of light
black
the absence of all colors of light
red, green, and blue
the primary colors of light
primary colors
term for the three colors of light that, when mixed in equal amounts, make white
secondary colors
term for colors of light that are blends of two primaries in equal amounts
complementary colors
term for any two colors whose additive mixture is white
the light reflected from an object's surface
What determines an object's color?
transparent
If a surface belongs to an object made of a _____ material, most of the light travels through the object-- that is, most of the light is transmitted.
opaque
When light falls on a nontransparent, or ____, material, the individual rays are either reflected or absorbed.
color filter
term for a sheet of material that is transparent to some frequencies and opaque to others
gray
the color of a surface that reflects between 10% and 80% of the light at any frequency
hue
term for the qualitative aspect of color
pure color
term for a color without any shading or tinting
brightness
term for our subjective response to the intensity of reflected light
pigments
term for dyes and paints
subtractive mixing
term for mixing paints on a palette
secondary colors and subtractive primaries
two terms for cyan, magenta, and yellow
subtractive secondaries
term for red, green, and blue when they are obtained by subtractive mixing