CTD 461 Exam 2 Questions With 100%
Verified Answers
Color Spectrum -
correct answer ✅violet - 390-420
indigo- 420-430
blue - 430-500
green- 500-570
yellow- 570-580
orange- 580- 610
red- 610-700
Spectral Reflectance Curves (SRC) -
correct answer ✅- Invariant or non- metameric match
- the same coloarants and subtrayes must be used in preparing
materials
- color measuring instrument such as spectrophomteter using
monochromatic light can measure the SRC of a sample
- Dominant wavelength defined as "wavelength of monochromatic
stimulus"
Metamerism -
correct answer ✅one observer indicates a match while the other
does not, two ojects match under one light source but do not
, CTD 461 Exam 2 Questions With 100%
Verified Answers
match under another, the only way to have an invariant match
(non- metameric) is for the two materials to have indentical
spectral reflectance curves, only way to that identical spectral
reflectance curves is to use the same colorants and substrates in
preparing the materials
CIE L*a*b* space -
correct answer ✅device independent 3D color space that enables
accurate measurements and comparison of all perceivable colors
using 3 color values - defined by the international commissions on
illumination
CIE L*a*b* give basic color name from numbers -
correct answer ✅L* - lightness coordinate
a* - red/ green coordinate, with +a* indicating red and -a*
indicating green
b*- yellow/blue coordinate with +b* indicating yellow and -b*
indicating blue
CIE system based on light source, subtrate, obersver/ detector
which are needed to produce the sensation of color
Verified Answers
Color Spectrum -
correct answer ✅violet - 390-420
indigo- 420-430
blue - 430-500
green- 500-570
yellow- 570-580
orange- 580- 610
red- 610-700
Spectral Reflectance Curves (SRC) -
correct answer ✅- Invariant or non- metameric match
- the same coloarants and subtrayes must be used in preparing
materials
- color measuring instrument such as spectrophomteter using
monochromatic light can measure the SRC of a sample
- Dominant wavelength defined as "wavelength of monochromatic
stimulus"
Metamerism -
correct answer ✅one observer indicates a match while the other
does not, two ojects match under one light source but do not
, CTD 461 Exam 2 Questions With 100%
Verified Answers
match under another, the only way to have an invariant match
(non- metameric) is for the two materials to have indentical
spectral reflectance curves, only way to that identical spectral
reflectance curves is to use the same colorants and substrates in
preparing the materials
CIE L*a*b* space -
correct answer ✅device independent 3D color space that enables
accurate measurements and comparison of all perceivable colors
using 3 color values - defined by the international commissions on
illumination
CIE L*a*b* give basic color name from numbers -
correct answer ✅L* - lightness coordinate
a* - red/ green coordinate, with +a* indicating red and -a*
indicating green
b*- yellow/blue coordinate with +b* indicating yellow and -b*
indicating blue
CIE system based on light source, subtrate, obersver/ detector
which are needed to produce the sensation of color
