®
M o d e l N o . O S - 8 5 1 5 B
E x p e r i m e n t 1 2 : F o c a l L e n g t h a n d M a g n i f i c a ti o n o f a T h i n L e n s
33
3.
For each intercept, calculate a value of
f
and record it in Table 12.2.
4.
Find the percent difference between these two values of
f
and record them in
5.
Average these two values of
f.
Find the percent difference between this average
and the focal length that you found in Part I. Record these data in Table 12.2.
Analysis Part B: Magnification
1.
For the first two data points only (the first two lines of Table 12.2), use image and
object distances to calculate the magnification,
M
, at each position of the lens.
Record the results in Table 12.3.
(eq. 12.2)
Table 12.1: Image and Object Distances
Distance from
light source to
screen
d
o
d
i
1/
d
o
1/
d
i
Image Size
Object Size
100 cm
90 cm
80 cm
70 cm
60 cm
50 cm
Table 12.2: Focal Length
f
Result from x-intercept
Result from y-intercept
% difference between results from intercepts
Average of results from intercepts
Result from Part I
% difference between Average of results from intercepts and result from Part I
M
d
i
d
o
-----
⎝ ⎠
⎜ ⎟
⎛ ⎞
–
=
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 ...