UNIT D: LESSON 2 (PY 131)
what is the solar radiation curve?
a plot of brightness of sunlight versus its frequency
if three primary colors of light are to shine on a white wall to produce a white spot, the primaries must be
additive
why do air molecules make the sky blue?
air molecules act as resonators which scatter blue light
why would a distant mountain range have a blue tint?
because the color of atmosphere between the observer and the hills is blue
why is water green-blue?
because water absorbs red light
what color is red appear as in very deep water?
black
what color will a blue sheet of appear as when illuminated with a yellow light?
black
what color will a red sheet of paper appear as when illuminated with a cyan light?
black
what color is created when red and green pigments are mixed?
blackish-brown
what color light is reflected by a blue object?
blue
what color would sunsets be if the atmosphere scattered orange light instead of blue light?
blue
what color would distant snowy hills be in a yellow atmostphere?
bluish
are the colors seen on a TV screen made from color addition or color subtraction?
color addition
is the color on the cover of your physics textbook a result of color addition or color subtraction?
color subtraction
what are complimentary colors?
complimentary colors produce white light when added together
what determines the color of light?
frequency
what color is created when cyan and yellow pigments are mixed?
green
what color would best reflect light from a green sun?
green
In what part of the electromagnetic spectrum is first absorbed by water?
infrared light
what happens when the frequency of light matches the natural frequency of molecules in a material?
light is absorbed
why are sunsets red?
low light frequencies survive being scattered in the air
what color would best absorb the light from a green sun?
magenta
what inks are used to print a color newspaper
magenta, cyan, yellow, and black
what color is the noon sun on jupiter?
none of these
what is the complementary color of blue?
orange
what colors of light mix to make magenta?
red and blue light
what colors are the pixels on a TV screen?
red, blue, and green
what color would the sun be at noon in an atmosphere 50 times thicker than earth's?
red-orange
what color would distant mountains appear as in a red atomosphere?
reddish
the color of an opaque object is the same as the light that is
reflected
distant snow covered hills appear yellowish because that is the color of the
reflected light that survives scattering
when is the sky the deepest blue?
right after a rainstorm
sunsets are red, blue jays are blue; the reason's the same:
scattered sunlight -- nothing new
do small bells or large bells interact more with high frequencies?
small bells
do large particles or small particles interact more with high frequency light?
small particles
what time of day does sunlight travel through the most atmosphere?
sunrise and sunset
what does a white sky suggest about the atmosphere's contencts?
the atmosphere is a mixture of particle sizes
why are clouds white?
the cloud's particles are different sizes
what do multiple colors in a sunset indicate?
the colors indicate atmospheric particles
will a darker or lighter piece of glass heat up faster in the sunlight?
the darker glass
why is it difficult to see the road while driving in the rain?
the film of water on the roadway makes the road less diffuse
what does the redness of a lunar eclipe give evidence for?
the refraction of sunsets and sunrises all around the world
will the temperature of a green pane of glass or a clear pane of glass rise faster in sunlight?
the temperature will rise faster in green glass
what determines the color of a light wave?
the wave's frequency
how many colors are used in a color printer?
three plus black
what are the main colors produced by the sun?
yellow-green
