course phys 202
Experiment 28:Part I:
1.
a. 50cm, 8cm between lens and image
b. 2.5cm in between flame, 1cm in between distance of images
c. the oppisite image disappears when covering one of the flames
2.
a. 30cm, 13cm between lens and image
b. 2.5cm in between flame, 1.7cm in between distance of images
c. the oppisite image disappears when covering one of the flames
3.
a. 20cm, 23cm between lens and image
b. 2.5cm in between flame, 4 cm in between distance of images
c. the oppisite image disappears when covering one of the flames
4.
a. 3cm, 30cm between lens and image
b. 2.cm in between flame, the image is to blurry to record a seperation
Part II:
- the sharpness and the sixe of the sharpest image changes with distance and becomes sharper when it is moved forward (closer to the source)
Analyze Results: in meters
Part I: focal distance
1. 1/.08m + 1/.50m= .069m
2. 1/.13m + 1/.30m= .091m
3. 1/.23m + 1/.20m= .107m
4. 1/.30m + 1/.03m= .027 m
Part I: Magnification m= i/o
1. .08m/.50m= .16m
2. .13m/.30m= .433m
3. .23m/.20m= 1.15m
4. .30m/.03m= 10m
The evidence that the images of the two candles are inverted is the principle of reversibility, which states that if the direction of a light ray is reversed, the light retraces its original path. The image is real, and is smaller, and inverted relative to the object. Also when the object is located beyond the center of the curvature, a real image is created that is reduced in size and is inverted relative to the object, which happened in this case.
&#This looks good. Let me know if you have any questions. &#