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24 Cards in this Set
- Front
- Back
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What is the 'nm' range for the Visible Spectrum of light?
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400 - 700 nm
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True or False -
The concept of good colour is extremely subjective |
True
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What 3 things does the Retina contain?
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1. Photoreceptors
2. Rod Cells 3. Cone Cells |
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What is the job of Photoreceptors?
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- A structure or cell that is sensitive to light
- The photoreceptors are the rods and cones of the eye's retina |
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What is the job of the Rod's cells?
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- Responsible for vision in low-light
- Monochromatic (do not detect colour) |
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What is the job of the Cone's cells?
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- Function in moderate to bright light and a higher resolution than rod cells
- 3 types of cones (RGB) allow for trichromatic vision - Light is reduced to 3 components that the brain interprets as colour |
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What does the CIE observer do?
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Emulates human vision
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True or False -
The 2 degree observer angle represents the average spectral response of human observers |
False, it is 10 degrees.
2 degrees is the standard choice for the Graphic Arts |
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Define Metamerism
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Colour of an object that matches under one light source, but not another.
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True or False -
1 in 12 males have some degree of colour blindness |
True
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Name 3 instruments that can be used to assess colour:
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1. Densitometers
2. Colourimeters 3. Spectrophotometers |
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True or False -
Devices that emit light work with the additive colour model |
True
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Additive primaries are typically _____ what?
All colours combine to make _____ what? |
RGB
White |
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Red + Green =
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Yellow
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Red + Blue =
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Magenta
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Green + Blue =
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Cyan
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Red + Green + Blue =
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White
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Describe Devices that work using the subtractive colour model
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They used dyes, pigments, or inks
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Cyan subtracts _______ from white light
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Red
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Magenta subtracts _______ from white light
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Green
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Yellow subtracts _______ from white light
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Blue
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Blue is opposite _______
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Yellow
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Green is opposite ________
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Magenta
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Red is opposite ________
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Cyan
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