What are the pigments and their applications: 2) What is the difference between lightfastness and permanence of pigments? 3) Explain the tinting strength of pigments and its relation with the size of the particle.
All questions please.
1) What are the pigments and their applications:
2) What is the difference between lightfastness and permanence of pigments?
3) Explain the tinting strength of pigments and its relation with the size of the particle.
4) Explain the opacity of pigments and its relation with the size of the particle.
5) What are the 4 ingredients for paints and explain each in one sentence.
1) a) Draw a human eye in the space below (LARGE!), and clearly label each of the parts
listed below.
Iris aqueous humor ciliary muscles Retina
Pupil Cornea vitreous humor Fovea
Sclera lens choroid optic Optic
b) In your diagram of the human eye, label all instances of refractions that happen from
when light first enters the eye to when it is absorbed by the retina.
2) Name 4 popular vision problem and explain each briefly.
3) a) Draw a schematic representation of a cone and a rod photoreceptors in the space below
(LARGE!), and clearly label each of the parts listed at right.
Outer segment Rhodopsin Synaptic terminal
Inner segment Photopsin Neurotransmitters
b) In your diagrams of the cone and rod photoreceptors, indicate the location of the
following processes: absorption of photons, release of neurotransmitters.
4) Compare spectral sensitivity and intrinsic sensitivity of the cones. Support your idea with
plotting the graph for both cases.
1) Consider color blue and color green,
a) plot a graph to show the resultant of mixing these two colors in additive color mixing
system. What is this color?
b) Now add red to the above mixture. Plot the graph for the resultant color. What is that
color?
2) Consider color cyan and color magenta,
a) plot a graph to show the resultant of mixing these two colors in subtractive color
mixing system. What is this color?
b) Now add yellow to the above mixture. Plot the graph for the resultant color. What is
that color?
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