Physics chapter 28
What is white?
A combination of all colors
Line spectrum
A pattern of distinct lines of color, with each line corresponding to a frequency of light
Red, green, and blue are -----
Additive primary colors
Spectroscope
An instrument used to separate the light from a hot gas or other light source into its constitutent frequencies
Blue + green =
Cyan
The sky is blue because its component particles scatter -----
High-frequency light
Red + blue =
Magenta
If a material absorbs light of the most visible frequencies & reflects red, what color do you see?
Red
The color of a ----- object is the color of the light it transmits
Transparent
True/False: Different materials have different natural frequencies for absorbing and emitting radiation.
True
What color light will you see when mix red, green, and blue?
White
----- is the combination of all colors
White light
A combination of all the colors
White light
Sunlight is an example of -----
White light
Red + green =
Yellow
At night, the human eye is able to see better under which light of equal brightness?
Yellow sodium vapor
----- is the brightest part of sunlight
Yellow-green
Scattering
A process in which sound or light is absorbed and reemitted in all directions
Excited state
A state with greater energy than the atoms lowest energy state
The natural coloring matter of animal or plant tissue
Pigment
Water is greenish-blue because it absorbs -----
Red
The color of opaque objects are that color because they do what with light?
Reflect
A band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
Spectrum
Magenta, yellow, and cyan are -----
Subtractive primary colors
What is composed of a mixture of all the colors of the rainbow?
Sunlight
What is black?
The absence of light
Subtractive primary colors
The colors of magenta, yellow, and cyan. These are the three colors most useful in color mixing by subtraction.
----- is not a color but the absence of light.
Black
The color spectrum goes: red, orange, yellow, green, -----, indigo, violet. What color is missing?
Blue
The color of an ----- object is the color of light it reflects
Opaque
Red, blue, and green light. These colors when added together produce white light.
Additive primary colors
A ----- emits a light that is deficient in high frequencies, so it reflects yellow light
Candle
Cells that contain ----- absorb light of most frequencies & reflect the green part so they appear green.
Chlorophyll
Every color has a ----- color that when added to it will produce white
Complementary
These colors added together will produce whote
Complementary colors
A ----- lamp is richer in higher-frequencies
Fluorescent
An ----- lamp emits light of all the frequencies but more of lower-frequencies
Incandescent
Who was the first person to form a systematic study of color?
Isaac Newton
Are black and white real colors?
No
Can the human eye see the highest frequency of light?
No
Can the human eye see the lowest frequency of light?
No
True/False: Newton showed that the colors in the spectrum were a property not of the prism, but of white light itself.
True
True/False: Strictly speaking, white isn't a color but a combination of all colors.
True
True/False: colors in daylight appear different from the way they appear when illuminated with either an incandescent lamp or fluorescent lamp
True
The brightness of solar frequencies are -----
Uneven