®
B a s i c O p t i c s S y s t e m
T e a c h e r ’ s G u i d e
52
Part 2:
Typical results.
y-intercept = 1/
f =
0.0977 cm
-1
x-intercept = 1/
f =
0.103 cm
-1
Answers to questions:
1.
The image if inverted.
2.
The image is real because it can be viewed on a screen.
3.
For a given object-to-image distance, the two object distance-image distance pairs are the inverse of each
other, which demonstrates the reversibility of light through a lens.
4.
The magnification is negative because the
image is inverted.
5.
The three determined values of
f
are unlikely to be exactly equal, primarily due to measure-
ment error.
Table 12.1: Image and Object Distances
Distance from
light source to
screen
d
o
(cm)
d
i
(cm)
1/
d
o
(cm
-1
)
1/
d
i
(cm
-1
)
Image Size
Object Size
100 cm
88.5
11.5
0.0113
0.0870
5.5 mm
42 mm
11.0
89.0
0.0909
0.0112
81 mm
10 mm
90 cm
78.3
11.7
0.0128
0.0855
11.3
78.7
0.0885
0.0127
80 cm
68.0
12.0
0.0147
0.0833
11.5
68.5
0.0870
0.0146
70 cm
57.7
12.3
0.0173
0.0813
11.9
58.1
0.0840
0.0172
60 cm
47.1
12.9
0.0212
0.0775
12.3
47.7
0.0813
0.0210
50 cm
36.0
14.0
0.0278
0.0714
13.4
36.6
0.0746
0.0273
f
Result from x-intercept
9.75 cm
Result from y-intercept
10.2 cm
% difference between results from intercepts
4.4%
Average of results from intercepts
9.98 cm
Result from Part I
10.0 cm
% difference between Average of results from intercepts and result from Part I
0.2%
Point 1
Point 2
calculated from image and object distances
-0.130
-8.09
calculated from image and object sizes
0.13
8.1
% difference
0%
0.1%
M
M
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 ...