Why is the Sky Blue?
Sunlight contains all of the colors of light, but much of it is:
a. blue
b. violet
c. yellow
d. red
yellow
What color do complementary colors of light make when put together?
white light
What color combination is easiest for our eyes to detect?
yellow-green
If the molecules in the sky scattered orange light instead of blue, sunsets would be colored ______________
blue
The colors of light emitted by incandescent gases show what?
Identity of atoms in the gases
The reason why the sky is blue is that air molecules
a. are blue
b. absorb yellow light
c. reflect blue light
d. absorb then re-emit blue light, scattering it
absorb then re-emit blue light, scattering it in all directions
The three paint colors that are useful for color subtraction are ___________________
magenta, cyan, and yellow
What is the complementary color of green?
magenta
If sunlight were red instead of white, what would be the most comfortable color to wear on a hot day?
red
Why do spectral lines in a line spectrum take the shape of lines?
The slit of the spectroscope is itself a line opening
Sunsets are red because:
a. longest path of sunlight through the atmosphere is at sunset
b. a lot of high-frequency light is scattered by the atmosphere
c. blue light from the sun is scattered by the Earth's atmosphere
d. all of the above
e. none of the above
all of the above
Colors on a TV result from color
a. addition
b. subtraction
c. spectroscopy
addition
A photograph of a cyan sweater shows as what color on the negative?
red
If water is actually blue-green, how would it appear if a red light was shining upon it?
black
What kinds of instrument can you use to determine what the stars are made up of?
spectroscope
Why do clouds appear white?
Water molecules of different sizes form clusters, scattering different colors of light
Colors seen in a photograph result from
a. addition
b. subtraction
c. spectroscopy
subtraction
When a red and green light shine on a white sheet of paper, what is the resulting color?
yellow
What would happen if you were playing tennis with a red tennis ball with cyan lighting on the court?
It would appear black/ You would get hit in the face with the ball
When an element is heated until it glows, the color it gives off is
a. a continuous band of color
b. a composite of many frequencies of light
c. a single frequency of light
a composite of many frequencies of light
Why are the tops of waves as they overturn white?
the water has broken into an assortment of tiny particles that scatter all colors
What are the colors of the dots that make up the color on a TV screen?
red, blue and green
The three primary colors of light for additive color mixing are
red, green and blue
If the atmosphere were 50 times thicker than it is now, the sun would appear
a. blue-violet
b. orange-green
c. red-orange
d. green-blue
red-orange
Different colors of light correspond to different light _________________________
frequencies