Discussion
Match each element of the colour perception process with its role.
List I
A. Light source
B. Object
C. Eye and brain
D. Colour
List II
1. receives the light and forms the perception
2. supplies the spectral power distribution
3. the resulting perception in the observer
4. modifies that light by reflection or transmission
Answer: D
Correct answer: A-2, B-4, C-1, D-3
Four elements with four distinct roles. The source supplies the spectral power distribution. The object modifies it by reflection or transmission according to its own reflectance. The eye and brain receive what remains and form the perception. And colour is that perception - the outcome of the process rather than one of its ingredients.
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