Lecture 14 Flashcards
What are the chromatic colours?
blue, green, red
What is selective reflection?
when certain
wavelengths are reflected by objects more than others
What are achromatic colors?
Achromatic colours (gray, black, white) are
perceived when light is reflected equally
across the spectrum
What are reflectance curves?
- Reflectance curves plot percentage of light transmitted at each wavelength
What is selective transmission?
The colour of objects that are transparent are created
Describe transmission curves
This occurs when only certain wavelengths pass through objects (e.g.
cranberry juice selectively transmitting long wavelengths results in a reddish
appearance)
- Can be plotted with transmission curves
What is subtractive color mixing?
Subtractive colour mixing occurs
when mixing together paints that have
different pigments
What is additive color mixing?
Additive colour mixing occurs when mixing
lights of different wavelengths
- All of the light that is reflected from the surface
by each light when alone is also reflected when
the lights are superimposed
What are spectral colours?
those that appear on the spectrum
How are nonspectral colours made?
Many nonspectral colours exist, which can only be created by mixing
spectral colours in various combinations (
What is hue?
another term for a chromatic colour (blue, red, etc.), or what we might
refer to as a ‘pure’ colour
What is value?
the light-to-dark
dimension
What is saturation?
the amount of white in a hue
Describe HSV solids
HSV (hue/saturation/value) colour solids can be used to determine additive
colour combinations
What is the Trichromatic theory?
The Trichromatic Theory was initially proposed by Young, and then was supported with experimental evidence by Maxwell and Helmholtz
