1. TOPIC: Microscope AIM: What are the parts of a microscope?

2. Microscope
Instrument that produces a larger image of an object (specimen) using lenses

3. Lens Piece of curved glass
Causes light rays to come together or spread apart
Magnify an image

5. Uses 1 lens and light to magnify the specimen
Simple
Microscope
Uses 1 lens and light to magnify the specimen

6. Uses 2 lenses & light to magnify specimen Need stain (dye) to see it
Compound
Light
Microscope
Uses 2 lenses & light to magnify specimen
Need stain (dye) to see it

7. Blood

8. Cheek Cells 40x

9. Onion Cells 10x

10. PARTS OF A MICROSCOPE

11. 1.
eyepiece
Ocular lens (usually 10x)
Lens you look through

12. 2. Objective lenses Contains lenses Low, medium, high power High Power
Low Power
High Power

14. Low power objective = used to locate the specimen on the slide
Larger field of view (See more of the entire object)
High power objective =
More magnification
Smaller field of view(see less of the entire object)

15. Holds & rotates obj. lenses3.
Nosepiece
Holds & rotates obj. lenses

16. Connects eyepiece to nosepiece4.
Body Tube
Connects eyepiece to nosepiece

17. Supports body tube
5. Arm

18. Bottom = support
6. Base

19. Where slide is placed
7. Stage

20. Hold slide in place 8.
Stage
Clips

21. Illuminates specimen, provides light9.
Mirror/ light

22. Controls the AMOUNT of light used
10.
Diaphragm
Controls the AMOUNT of light used

25. Larger focusing knob
11.
Coarse
Adjustment
Knob

26. For focusing under LOW POWER ONLY
If used under high power, objective lens and/or slide can break

28. Focusing for High Power
Sharpens image
Focusing for High Power
12.
Fine
Adjustment
Knob

29. Most
powerful
microscope
Electron microscope: magnifies up to 1 million times
Uses beam of electrons instead of light

30. Fly

31. Spider

32. Termite head

33. Tapeworm

34. Blood

35. SEM Scanning Electron Microscope Produces real, 3D image
Only scans surface
magnifies 20x - to 200,000x
SEM

36. TEM Transmission Electron Microscope
Produces 2D image of thinly sliced organism
magnifies 1,000x -1,000,000x

38. View living specimens without staining
Phase
Contrast
Microscope
View living specimens without staining

39. Light microscope
Phase contrast microscope