The purpose of this experiment is to observe different types of mirror and how the image of an object will be projected in the mirror. In this experiment, a convex, a concave and a regular mirror will be used on an object to observe the image projected and what happens if the object gets closer or further from the mirror.
Experimental
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| Convex Mirror |
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| Concave mirror |
The image is observed as follow following the diagram below:
 |
| convex mirror diagram |
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| concave mirror diagram |
|
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Convex
|
Concave
|
|
ho (cm)
|
2.2
|
2.3
|
|
hi (cm)
|
0.7
|
0.6
|
|
do (cm)
|
5.7
|
11.7
|
|
di (cm)
|
1.9
|
3.2
|
|
hi/ho
|
0.318
|
0.261
|
|
di/do
|
0.333
|
0.273
|
Conclusion
Based on the observation of the experiment, the convex mirror has an image smaller than the actual object. The image is also in an upright position and its further from the actual distance. When the object is moved closer to the mirror, it gets larger than the original spot but the characteristic of upright, smaller than the object and further still apply. When it gets farther, it gets really small compare to the original object. This observation agree with the diagram shown above.
The concave mirror makes the size of the object larger and upright. It also closer than the actual object. When the object gets further from the mirror, it gets larger until it reaches the focal point where it switch from upright to inverted and getting smaller as it goes further. This is again agree with the diagram. As seen in the diagram , when object is placed far from the focal point, it becomes inverted and smaller. If the object is in between focal point and the mirror, the image will be larger and upright.
In the case of regular mirror, the distance of the object and the image is the same. The image is upright and the same size as the object.
The magnification of the mirror from the data table above is obtained by measuring the distance and height with a ruler. The magnification for each mirror is just the ratio between image distance with the object distance or it could also be the ratio of the height image to height object.
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