The document describes the construction and working of a simple compound microscope using two convex lenses of focal lengths 10 cm and 30 cm. The microscope produces real, inverted, and magnified images of objects placed very near to it, with magnifications of -3.66 for an image at the near point of distinct vision and -1.66 for an image at infinity.

1. Aim
To understand the construction and working of a microscope using convex
lenses of suitable focal lengths.

2. Introduction

3. Apparatus used
Convex lenses of focal lengths 10 cm and 30 cm
Ivory sheets
Adhesive tape

4. Theory and working
1.)Construction
2.)Working of compound microscope

8. Magnification for the microscope made by two given lenses
L = 20cm = 0.2m
fe = 30cm = 0.3m
fo = 10cm = 0.1m
D = 25cm = 0.25m
m = -
0.2
0.1
(1 +
0.25
0.3
) = -3.66 for image at least ditance of distinct vission
m = -
0.2
0.1
0.25
0.3
= -1.66 for image at infinity

9. Conclusion
Thew microscope designed is able to produce real, inverted and magnified
images of the objects very near to it.
Sources of errors
Write yourself
Precautions
Write yourself
Bibliography
NCERT textbook of class 12
Physics by S.L.Arora
Designs available on internet