The purpose of this lab is to be able to analyze the characteristic of a converging lens to the image. In this experiment, a lens with measured focal length will be set in front of a light source and the image obtained from the light source. In this experiment, the distance from lens to light source and the lens from the image is measured. The image is measured when focus is achieved.
Experimental
The setup for the lab is as follow
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| Setup of the lab |
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| different angle of the setup |
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| The shape of the image |
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| Measurement of the image distance |
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| Light source for part 2 using different object |
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| The image of the object used |
Focal Length = 20cm ± 0.5cm
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Object distance (cm)
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Image distance (cm)
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Object height (cm)
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Image Height (cm)
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M
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Image Type
|
|
100
|
23
|
5.1
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1.7
|
0.333
|
Inverted, real
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80
|
24.5
|
5.1
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2
|
0.392
|
Inverted, real
|
|
60
|
28
|
5.1
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2.5
|
0.490
|
Inverted, real
|
Conclusion
Based on the result obtained, the object and image distance is indeed have an inverse relationship as shown in the first graph. On the second graph, we shows that it has linear relationship between the inverse image versus the negative inverse object distance. Since we didn't have the time to complete the actual lab, the image of the 0.5 focal length distance is unknown, but we predicted for it to have inverted, real image but it will be rather difficult to focus the image in the board. Some error that contributes to the accuracy of the graph is the lenses used might have deteriorated a little bit which change the focal length for a little bit.
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