2. • Colors are important in both identifying objects,
i.e., in locating them in space, and in re-
identifying them
• Much is known about human color vision both
subjectively and quantitatively from the fields of
physics, psychology and physiology
• Despite much thought, by philosophers and
scientists, we seem little closer now to an
agreed account of color than we ever were ! ! !
3. • The disagreement:
• Some theorists believe colors to be perceiver-
relative, e.g., dispositions or powers to induce
experiences of a certain kind, or to appear in
certain ways to observers of a certain kind
• Others take them to be objective, physical
properties of objects
• The major problem with color has to do with
fitting what we seem to know about colors into
what science, particularly physics, tells us about
physical bodies and their qualities
4. • we experience color as an intrinsic feature of the
surfaces of physical bodies, or as a property
spread throughout a volume, e.g., Apple Juice
• It is this problem that historically has led the
major physicists who have thought about color,
to hold a common view: that the colors we
ordinarily and naturally take objects to possess,
are such that physical objects do not actually
have them
5. • COLOUR is a sensory perception
produced in brain.
• It requires:
• A Light Source
• An Object
• An Observer
