Color and Shade Matching

Question 1

the human perception of color results from the interaction of three elements

Answer 1

light source
object
observer

Question 2

where does the perception of color lie

Answer 2

in the brain

Question 3

where are neurons located in the eye

Answer 3

retina

Question 4

what are the two photo-receptors

Answer 4

rods
cones

Question 5

which of the two photoreceptors are the more numerous

Answer 5

rods

Question 6

rods detect what type of light

Answer 6

low levels of light

Question 7

can rods detect color

Answer 7

no - they help us see in grayscale

Question 8

cones detect what type of light

Answer 8

bright light and provide color acuity

Question 9

photoreceptors transmit through what nerve to reach the brain

Answer 9

optic

Question 10

what are the 3 types of cones that are sensitive to what different wavelengths of light

Answer 10

red, blue, green (green and red are for more long wavelengths)

Question 11

the most common color deficiency is an individual with partial green defect is known as

Answer 11

deuteranomaly

Question 12

monochromacy/achromacy is

Answer 12

colorblind individuals who lack all three cones

Question 13

Munsell’s color system forms the basis for the classification of colored objects in three dimension

Answer 13

hue
value
chroma

Question 14

hue

Answer 14

the attribute in which an object appears red, orange, yellow, green, blue, etc

true colors

Question 15

value

Answer 15

refers to the lightness of a colors and is a vertical scale from black to white

Question 16

chroma

Answer 16

is related to variation in strength of the same color.

The further away from the achromatic vertical axis, the higher the chroma(strong, more intense). The closer the color is to the achromatic axis (value) the lower the chroma (pale,weak)

Question 17

as chroma increases what happens to the hue

Answer 17

it becomes more specific

Question 18

translucency

Answer 18

the degree to which an object scatters light upon transmission

Question 19

how long does it take for retinal fatigue to occur

Answer 19

30 seconds or more

Question 20

dentin is the primary source of what esthetic tooth characteristic

Answer 20

fluorescence

Question 21

thick enamel is higher or lower in value compared to thin enamel

Answer 21

high

Question 22

when color matching, what is the best light

Answer 22

white light that is similar to daylight

Question 23

if a shade tab is placed onto of an adjacent tooth what is the effect on color matching

Answer 23

the shade will appear lighter because it is closer to the eye
(to avoid this, incline the shade 120 degrees)