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

1. TOPIC: MicroscopeAIM: 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. Simple Microscope Uses 1 lens and light to magnify the specimen

6. 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 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. 3. Nosepiece Holds & rotates obj. lenses

16. 4. Body Tube Connects eyepiece to nosepiece

17. 5. Arm Supports body tube

18. 6. Base Bottom = support

19. 7. Stage Where slide is placed

20. 8. Stage Clips Hold slide in place

21. 9. Mirror/ light Illuminates specimen, provides light

22. 10. Diaphragm Controls the AMOUNT of light used

25. 11. Coarse Adjustment Knob Larger focusing knob

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

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

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

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

38. Phase Contrast Microscope View living specimens without staining

39. Light microscope Phase contrast microscope