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B a s i c O p t i c s S y s t e m
E x p e r i m e n t 1 : C o l o r A d d i t i o n
8
Part 2: Observing Colored Ink Under Colored Light
Procedure
1.
While you look away, have your partner draw two lines—one red and one
black—on a sheet of white paper. One of the lines should be labeled A, and the
other B, but you should not know which is which.
Before you look at the paper, have your partner turn off the room lights and cover
the red and green bars so the paper is illuminated only with
blue
light.
Now look. What colors do the two lines appear to be? Do they appear to be
different colors? Record your observations in Table 1.2.
Finally, observe the lines under white light and record their actual colors in Table
1.2.
2.
Repeat step 1, but this time have your partner draw lines using blue and black ink
(labeled C and D), and observe them under
red
light.
3.
For Trial 2, switch roles and repeat steps 1 and 2 with your partner observing
lines that you have drawn. Record the results in Table 1.2. (For this trial, you may
try to trick your partner by drawing both lines the same color—both red or both
black, for instance.)
4.
Look at red and black lines under red light. Which line is easier to see?
_________________________
Questions
1.
What makes red ink appear red? When red ink is illumined by blue light, is most
of the light absorbed or reflected?
2.
When illumined with red light, why is red ink on white paper more difficult to
see than black ink?
Table 1.2: Colored Ink Observed Under Colored Light
Trial 1:
Name of observer: ______________________________________
Color of Light
Line
Apparent Color of Ink
Do they look different?
Actual Color of Ink
Blue Light
A
B
Red Light
C
D
Trial 2:
Name of observer: ______________________________________
Color of Light
Line
Apparent Color of Ink
Do they look different?
Actual Color of Ink
Blue Light
A
B
Red Light
C
D
Summary of Contents for OS-8515B
Page 6: ... Basic Optics System About the Experiments 6 ...
Page 26: ... Basic Optics System Experiment 9 Apparent Depth 26 ...
Page 38: ... Basic Optics System Experiment 13 Telescope 38 ...
Page 42: ... Basic Optics System Experiment 14 Microscope 42 ...
Page 44: ... Basic Optics System Experiment 15 Shadows 44 ...
Page 46: ... Basic Optics System Telescope and Microscope Test Pattern 46 ...