Physics Color chapter 28

What does each line in a line spectrum represent

Each line corresponds to a distinct frequency of light emitted by the atom

. How is the frequency of a photon related to the energy change in an atom

Frequency is directly proportional to the energy change

48. Although violet light is scattered more than blue light, our eyes see the sky as blue Explain

Our eyes are more sensitive to blue light than to violet light, so we see the sky as blue.

Describe how the color of the sky changes as more and more high frequency light is scattered.

The sky becomes progressively redder, going from yellow to orange

Explain why many clouds appear white

They contain water droplets with a wide range of sizes. These droplets scatter a wide range of frequencies to produce a white-looking cloud.

circle the letter of each statement that tis true about Newtons study of color a) he studied sunlight b) he passed sunlight through triangular shaped pieces of glass c) he observed that sunlight was broken into a rainbow like pattern of colors d) he showed that sunlight is yellow light

a) he studied sunlight b) he passed sunlight through triangular shaped pieces of glass c) he observed that sunlight was broken into a rainbow like pattern of colors

Circle the letter of the color of light that is scattered the least as it passes through the atmosphere. a. red b. orange c. yellow d. blue

a. red

Circle the letter of the color(s) that water molecules absorb. a. red b. green c. blue d. all

a. red

red, blue, and green light are known as the _____________ colors

additive primary

What is a spectroscope

an instrument used to analyze the light emitted by glowing element

circle the letter that explains what the energy from the light absorbed by a piece of glass does to the glass a) the energy hardens the glass b) the energy warms the glass c) the energy darkens the glass d) the energy has no effect on the glass

b) the energy warms the glass

yellow complimentary

blue

what color(s) are absorbed by yellow paint

blue and violet

As the path of sunlight through the atmosphere increases, what color of light is scattered more

blue light

circle the letter that best describes the color of an opaque object a) an opaque object is the color it absorbs b) an opaque object is the color of the light that shines on it c) an opaque object is the color it reflects d) an opaque object is the color of white light

c) an opaque object is the color it reflects

circle the letter that best explains why cells containing chlorophyll are green a) they absorb green light b) they produce food c) the reflect green light d) they are very small

c) the reflect green light

Circle the letter that describes what occurs when many particles larger than oxygen and nitrogen molecules are in the atmosphere. a. The sky appears darker blue. b. The sky appears black. c. The sky appears whitish. d. The sky appears green.

c. The sky appears whitish.

Water molecules absorb certain frequencies of colored light. Circle the letter of the complementary color to the color that is absorbed a. magenta b. yellow c. cyan d. white

c. cyan

Circle the letter of the process in which sound or light is absorbed and reemitted in all directions. a. reflection b. resonance c. scattering d. stimulated emission

c. scattering

two colors of light that when added together produce white are known as ______________________________________

complimentary colors

circle the letter that best describes the light that results when a color is subtracted from white light a) black b) magenta c) muddy brown d) the complimentary color to the subtracted color

d) the complimentary color to the subtracted color

A cloud containing many large water droplets appears

dark

An energy level greater than an atom's lowest energy state is known as a

exited state

Is the following sentence true or false? At sunset, light reaches Earth's surface through a shorter path than at noon.

false

Is the following sentence true or false? The amount of scattering that occurs at sunset varies very little from day to day

false

Is the following sentence true or false? The deep-blue color of a pond or an ocean is due to the color of the water itself

false

Is the following sentence true or false? The presence of water droplets in the atmosphere does not affect how much light is scattered or what frequencies of light are scattered

false

Is the following sentence true or false? The sky appears blue because particles in the atmosphere scatter low-frequency light.

false

Is the following sentence true or false? The spectrum emitted by an excited atom is continuous

false

is the following sentence true or false? Black objects that you see absorb all light that falls on them ___________

false

is the following sentence true or false? the mixing of colored paints yields similar results as mixing the same colors of light ___________

false

is the following sentence true or false? when an object reemits the light that shines on it, absorption occurs _____

false

is the following true or false? the brightness of sunlight is directly proportional to frequency _____________

false

describe the process used to print a color image in a book

four different inks, magenta, yellow, cyan, and black, are used. Each color is printed on its own color plate. Each plate produces a series of ink dots on the page, the result of which gives the appearance of a wide range of colors

if white light shines on a mixture of blue and yellow paint, what color is not absorbed?

green

magenta complimentary

green

explain how a color television produces a wide range of colors on its screen

groupings of spots of red, blue, and green cover the screen. by varying how much each color spot is illuminated within each grouping, different colors are formed

cayan

mixture of green and blue

yellow

mixture of green and red

magenta

mixture of red and blue

different materials have different ____________ for absorbing and emitting radiation

natural frequencies

After reaching an excited state, an atom emits a(n) _________ and then returns to its normal state

photons

a ________ is a material in glass that selectively absorbs colored light

pigment

the graphical distribution of brightness versus frequency in sunlight is called the ______________________

radiation curve

cayan

red

what color(s) are absorbed by blue paint

red, orange, yellow

list the colors of the visible spectrum in the correct order

red, orange, yellow, green, blue, violet

a spread of colors is called a _________________

spectrum

The mixing of pigments, paints, or dyes is known as color mixing by___________________

subtraction

magenta, yellow, and cyan are the _______________________ colors used in printing illistrations in full color

subtractive primary colors

what determines the color of a transparent object?

the color of a transparent object is the color of the light it transmits

. What determines the colors emitted by an atom

the energy levels of its electrons

the picture below shows what happens when sunlight shines on a piece of blue glass. describe what happens to the sunlight as it passes through the glass

the glass transmits primarily the blue light and absorbs the other colors that illuminate it

what is the brightest portion of the spectrum of sunlight

the middle of the visible range or the yellow green region

explain what happens when paint or dyes are mixed

the mixture absorbs all the frequencies each paint absorbs

describe what happens when the frequency of the light shining on an object resonated with the object's natural frequency

the object absorbs the light

describe what happens when the frequency of the light shining on an object is higher or lower than the objects natural frequency

the object reemits the light

Describe the relationship between the size of a particle in the atmosphere and the frequency of the light it scatters.

the tinier the particle, the higher the frequency of light it will scatter.

. Is the following sentence true or false? At sunset, only lower-frequency light strikes Earth

true

Is the following sentence true or false? Atoms and molecules can behave like optical tuning forks, reemitting light waves that shine on them

true

Is the following sentence true or false? Water is transparent to nearly all the frequencies of white light

true

Is the following sentence true or false? When made to emit light, each element has its own unique color

true

is the following sentence true or false? Sunlight is a combination of all colors ____________

true

is the following sentence true or false? by mixing red, blue, and green light and adjusting the brightness of each, virtually any color can be formed _____________

true

is the following sentence true or false? different sources of light produce light made up of different frequencies. ________

true

is the following sentence true or false? human vision is most sensitive to colors in the red-orange part of the visible spectrum

true

Newton

was the first person to do a systematic study of color

a white object appears ________ when illuminated by white light

white

explain this statement: white and black are not actually colors

white is not a color but a combination of all colors. black is also not a color it is the absence of light

what color of light is produced when red, blue, and green light of equal brightness overlap? _______________

white light