1. THE COMPOUND LIGHT MICROSCOPE
Biology
THE COMPOUND LIGHT MICROSCOPE

2. What is the Compound Microscope?
The compound microscope is the most used instrument in biology classes.
It contains a combination of lenses.
You will be responsible for learning the name, function, and location of each part of the microscope.

3. Label the Parts of the Microscope

4. Label the Parts of the Microscope
Body tube

5. Label the Parts of the Microscope
Body tube
nosepiece

6. Label the Parts of the Microscope
Body tube
nosepiece
Low-power objective

7. Label the Parts of the Microscope
Body tube
nosepiece
Low-power objective
High power objective
High power objective

8. Label the Parts of the Microscope
Body tube
nosepiece
Low-power objective
High power objective
Stage clips

9. Label the Parts of the Microscope
Body tube
nosepiece
Low-power objective
High power objective
Stage clips
diaphragm

10. Label the Parts of the Microscope
Body tube
nosepiece
Low-power objective
High power objective
Stage clips
diaphragm
illuminator

11. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
Low-power objective
High power objective
Stage clips
diaphragm
illuminator

12. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
arm
Low-power objective
High power objective
Stage clips
diaphragm
illuminator

13. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
arm
Low-power objective
stage
High power objective
Stage clips
diaphragm
illuminator

14. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
arm
Low-power objective
stage
High power objective
Coarse adjustment knob
Stage clips
diaphragm
illuminator

15. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
arm
Low-power objective
stage
High power objective
Coarse adjustment knob
Stage clips
diaphragm
Fine adjustment knob
illuminator

16. Label the Parts of the Microscope
eyepiece
Body tube
nosepiece
arm
Low-power objective
stage
High power objective
Coarse adjustment knob
Stage clips
diaphragm
Fine adjustment knob
illuminator
base

17. Functions of Microscope Parts
Eyepiece- contains a magnifying lens(usually 10X)
Arm-supports the body tube
Stage-supports the slide being observed
Opening of the stage- permits light to pass up to the eyepiece
Fine adjustment knob-moves the body tube slightly to sharpen the image
Coarse adjustment knob- moves the stage to focus the image
Base-supports the microscope

18. Functions of Microscope Parts
Illuminator- produces light or reflects light up toward the eyepiece
Diaphragm- regulates the amount of light passing up toward the eyepiece
Diaphragm lever- opens and closes the diaphragm
Stage clips- holds the slide in place
Low-power objective- provides a magnification of 10X and it’s the shortest objective
High-power objective- provides a magnification of 40X and is the longest objective
Nosepiece- holds the objectives and can be rotated to change the magnification

19. Functions of Microscope Parts
Body tube- maintains the proper distance between the eyepiece and the objectives

20. Total magnification The formula
eyepiece magnification (10 x) x objective lens magnification
Example : What’s the total magnification for a microscope if it’s objective lens has a magnification of 40x?
10x * 40 x= 400x
Example: What’s the total magnification for a microscope if it’s objective lens has a magnification of 15x?
10x * 15 x= 150x

21. Any Questions?