Exam 3 3310

Additive color mixing is the creation of a new color by a process that adds one set of wavelengths to another set of wavelengths. a. True b. False

a. True

Spectral reflectance is the ratio of light reflected by an object at each wavelength. a.True b. false

a. Ture

When adding colors, blue and yellow create white through _______ color mixing and create green through _______ color mixing. a. additive; subtractive b. subtractive; additive c. additive; component d. multiple; opponent

a. additive; subtractive

White light, consisting of many wavelengths, is known as ______, whereas light consisting of one wavelength is known as ______. a. heterochromatic; monochromatic b. incandescent; fluorescent c. ultraviolet; infrared d.neural; peripheral

a. heterochromatic; monochromatic

Blue objects absorb most wavelengths but reflect light at about 450 nm. This phenomenon relates to ______. a. spectral reflectance b. resonance properties c. color spectrometry d. specter of bond

a. spectral reflectance

Color mixing in which a new color is made by the removal of wavelengths from a light with a broad spectrum of wavelengths is known as ______. a. subtractive color mixing b. additive color mixing c. multiplicative color mixing d. metameric color mixing

a. subtractive color mixing

Suppose you are the lighting director for a theater production. The current spotlight on the stage is too blue and you want to make it whiter. What colored spotlight would you shine on the same area to cancel out the blue? a.Yellow b. Blue c. Green d. Purple e. Orange

a. yellow

What is the difference between additive and subtractive color mixing? a. Additive mixing involves mixing similar colors of different brightness, whereas subtractive mixing involves mixing disparate colors of similar brightness. b. Additive color mixing is what happens when we mix lights of different colors, whereas subtractive color mixing occurs when we mix paints or other colored materials. c. Additive color mixing is what happens when we combine physical pigments, whereas subtractive color mixing is what happens when we filter out certain wavelengths. d. Additive color mixing occurs at the level of the retina, whereas subtractive color mixing occurs at the level of V4 in the occipital cortex.

b. Additive color mixing is what happens when we mix lights of different colors, whereas subtractive color mixing occurs when we mix paints or other colored materials.

A metamer is a psychophysical color contrast between two patches of light that have identical sets of wavelengths but are perceived as different colors due to their surroundings. a. true b. False

b. False

In this color circle, what dimension of color is represented by the perimeter of the circle? a. saturation b. hue c. brightness d. lightness quality

b. Hue

In an experiment in color matching, an observer is shown two patches of light. One is called the test patch, and the other is called the comparison patch. The test patch is a single wavelength of an unchanging illumination or brightness. The comparison patch is composed of three primary colors, such as the red, green, and blue used in a television. The observer has control over the intensities of the three lights in the comparison patch. The observer should be able to ______. a. control the colors so that they simulate real colors in the world b. control the comparison patch so that it looks identical to the test patch in color c. alter the comparison patch until it is a heterochromatic color d. alter the comparison patch until it is a spectral color

b. control the comparison patch so that it looks identical to the test patch in color

Mixing paints to create new colors is an example of _______ color mixing, while shining lights to create new colors is an example of _______ color mixing. a. additive; subtractive b. subtractive; additive c. additive; component d. multiple; opponent e. opponent; multiple

b. subtractive; additive

In an experiment in color matching, an observer is shown two patches of light. One is called the test patch, and the other is called the comparison patch. The test patch is a single wavelength of an unchanging illumination or brightness. The comparison patch is composed of three primary colors, such as the red, green, and blue used in a television. The observer has control over the intensities of the three lights in the comparison patch. The observer should be able to ______. a. control the colors so that they simulate real colors in the world b.control the comparison patch so that it looks identical to the test patch in color c. alter the comparison patch until it is a heterochromatic color d.alter the comparison patch until it is a spectral color

b.control the comparison patch so that it looks identical to the test patch in color

How many lights (of the correct type) are required to match any color that humans can see? a. One b. Two c. Three d. Four e. five

c. Three

Which of the following is a more saturated/less saturated pair of colors? a. gold/green b. green/red c. red/pink d. blue/silver

c. red/pink

Additive color mixing is used in which of the following technologies? a. designing paints for interior decor b. recreating color vision for color-deficient individuals c. simulating a full range of colors on a smart phone screen d. creating fabric dyes for clothing

c. simulating a full range of colors on a smart phone screen

The band of wavelengths from 400 to 700 nm that people with normal vision can detect is known as the ______. a. visual bandwidth b. electrovisual range c. visible spectrum d. electromagnetic resonance

c. visible spectrum

_______ are different mixtures of wavelengths that look identical a. Subtractive light mixtures b. Additive light mixtures c. Hues d. Metamers e. Illuminants

d. Metamers

An object that reflects all light of all wavelengths from its surface will be perceived as ______ a. red b. blue c. black d. white

d. white

Which of the following is an argument from the textbook about the usefulness of color vision? a. It helps animals during migration. b. It helps animals identify predators and avoid them. c. It aids in night vision. d. It improves peripheral vision. e. It helps animals find food and mates.

e. It helps animals find food and mates.