igure out F1, F2 and their averages?
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Question
P5
figure out F1, F2 and their averages? Also is the second data table's 1/f1 and 1/f2 correct?
Transcribed Image Text:Part I - Focal length of Convex Lens:
Table 1:
+
Trial #
1
2
3
4
S
6
7
8
Trial #
1
2
3
4
5
6
7
8
Lens 1 (Radius of curvature 80cm)
Appearance
Biconvex
Approximate focal
length.
do
(cm)
250
240
230
220
210
200
190
180.
Lens 1
1/do
(cm)
di
(cm)
110
112
114
116
118
120
R380.0
122
124
0.00400
0.00417
0.00435
0.00455
0.00476
0.00500
0.00526
0.00555
80cm each side of
the lens or total of
160 cm
fi
(cm)
1/d
(cm)
0.00909
0.00893
0.00877
0.00863
0.00848
0.00833
0.00820
0.00806
Average
fi
(cm)
1/fi
(cm)
0.01309
0.01310
0.01312
0.01318
0.01324
0.01333
0.01346
0.01361
Lens 2 (Radius of curvature 70cm)
Appearance
Approximate focal
length
do
(cm)
250
240
230
220
210
200
190
180
Lens 2
1/do
(cm)
0.00400
0.00417
0.00435
0.00455
0.00476
0.00500
0.00526
0.00555
di
(cm)
88
90
92
94
96
98
100
102
1/d
(cm)
0.0114
0.0111
0.0109
0.0106
0.0104
0.0102
0.0100
0.0098
Questions:
1. What is the orientation of the image on the screen?
The orientation is inverted.
2. How does the image change as the lens is moved farther away from the lamp?
The image gets smaller as the object is moved away from the lens.
3. Plot a graph of 1/do vs. 1/di. Plot the data for all lenses on the same graph.
Biconvex
70cm each side of
the lens or total of
140cm
f₂
(cm)
Average
f₂
(cm)
1/f
(cm)
0.01540
0.01527
0.01525
0.01515
0.01516
0.01520
0.01526
0.01535
I
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