Download The Telescope and the Microscope Lab

The Telescope and the Microscope Lab
Phys 102
Manju Sogi & Alma Fuentes
Abstract
The purpose of this experiment is to build a microscope and telescope while finding their
magnifying powers.
Data
Focal lengths of lenses
Lens B 14.47cm
Lens C
50 cm
Lens D
5.39 cm
Graphs
N/A
Sample Calculations
Focal lengths 1/f= 1/p + 1/q
Lens B =14.47 cm
Lens C = 50 cm (given)
Lens D = 5.39 cm
Microscope
Mtheo = -L*25/fo*fe -60*25/ 14.47*5.39 =-19.23
Mtheo = fo/fe
Mexp = hi/ho
Telescope
50/14.47= 3.45 cm
8.5/2.123 = 4cm
% diff = V1- V2 / (V1 + V2 / 2) *100
= 3.45 – 4 / (3.45 + 4/ 2) * 100
= 10.1%
Results
Microscope
Mtheo = -19.23
Telescope
Mtheo = 3.45
Mexp = 4
% Error
% diff = 10.1 %
Questions
Microscope
3a. The image that is seen through the lens is that of the object which was upside down.
1. In the refracting telescope 2 lenses are arranged so that the objective forms a real,
inverted image of the distant object very near the focal point of the eyepiece. Therefore
it’s objective’s focal length over the eyepiece’s focal length because the angular
magnification is the ratio of the angular size seen with the telescope to the angular size
seen with the unaided eye.
2. A prism and the phenomenon of total internal reflection can alter the direction of the
image that’s seen therefore the object viewed seems altered and erect.
3. 1/f = 1/p + 1/q
if p= infinity
1/p = 0 therefore 1/f = 1/q thus f= q
1/f= 1/f1 + 1/f2
Conclusion
In conclusion, we found that our experimental magnification, 4 for the telescope was
close to the theoretical magnification, 3.45. In addition, the experimental value for the
microscope was close to the theoretical value as well. The percent difference was 10.1
which was fairly close to the actual values. Thus any human errors made during the
experiment might have made that percent difference error.
Grade 70/100