the history of MICROSCOPES MAGNIFY SMALL OBJECTS 1

the history of. MICROSCOPES MAGNIFY SMALL OBJECTS 1. SIMPLE MICROSCOPES HAVE A SINGLE LENS a) FIRST LENSES MADE ABOUT 1000 AD b) SIMILAR TO A STRONG MAGNIFYING GLASS TODAY 2. COMPOUND MICROSCOPES HAVE 2 OR MORE LENSES a) EYEPIECE : LENS NEAR EYE, MAGNIFIES IMAGE b) OBJECTIVE: LENS AT BOTTOM OF BODY TUBE, FORMS AN IMAGE c) MAGNIFICATION : RESULTS FROM THE PRODUCT OF THE POWER OF EYEPIECE AND OBJECTIVE d) MOST COMMON LIGHT MICROSCOPE USED

the history of. MICROSCOPES 3. ELECTRON MICROSCOPES : REFLECTED ELECTRONS FORM IMAGE a) ALLOW EXTREMELY HIGH MAGNIFICATION b) GIVES EXCEPTIONAL DETAIL c) VERY EXPENSIVE Ø RESOLUTION : SHARPNESS OF IMAGE a) DEPENDS LENS QUALITY, ABILITY TO FOCUS b) ALLOWS GREATER DETAIL TO BE SEEN CLEARLY c) MOST IMPORTANT ATTRIBUTE OF MICROSCOPE

the history of. MICROSCOPES 1. 2. 3. ANTON VON LEEUWENHOEK FIRST TO OBSERVE LIVING CELLS a) USED A SIMPLE MICROSCOPE b) SAW LIVING MICROORGANISMS IN POND WATER ROBERT HOOKE : FIRST TO USE THE TERM " CELL" (1663) a) USED A COMPOUND MICROSCOPE TO SEE CORK CELL b) NAMED AFTER A TERM FOR A " SMALL ROOM" MATTHIAS SCHLEIDEN / THEODORE SCHWANN (1838) a) USED IMPROVED COMPOUND MICROSCOPES b) SAW THAT ALL ANIMALS AND PLANTS ARE MADE OF CELLS c) CONTRIBUTED TO DEVELOPMENT OF CELL THEORY

the MICROSCOPE term list #1 (p. 3, 8) 1. microscope 2. simple microscope 3. compound microscope 4. Robert Hooke Anton van Leeuwenhoek 6. Mathias Schleiden 7. Theodore Schwann 5. 8. magnification 9. resolution 10. electron microscope term list #2 1. eyepiece 2. body tube 3. nosepiece 4. objectives 5. stage 6. stage clips 7. slide 8. diaphragm 9. fine focus 10. coarse focus 11. arm 12. base 13. light source

parts of the MICROSCOPE 1. EYEPIECE : TOP OF BODY TUBE, MAGNIFIES IMAGE 2. BODY TUBE: HOLDS LENSES 3. ARM: HOLDS BODY TUBE TO BASE 4. NOSEPIECE : BOTTOM OF BODY TUBE, HOLDS OBJECTIVE(S) 5. STAGE CLIPS: HOLDS SLIDE IN PLACE 6. OBJECTIVE: BOTTOM OF BODY TUBE, FORMS IMAGE 7. STAGE STOP ADJUSTMENT 8. THE SLIDE 9. STAGE: SUPPORTS SLIDE OVER LIGHT SOURCE 10 COARSE FOCUS : LARGE ADJUSTMENTS IN FOCUS 11. DIAPHRAGM : CONTROLS LIGHT ENTERING STAGE 12. CONDENSER LENS / LIGHT SOURCE 13. FINE FOCUS : MAKES TINY CHANGES IN FOCUS 14. LIGHT SWITCH 15. BASE: SUPPORTS ENTIRE MICROSCOPE

procedure for the proper use of the MICROSCOPE Follow these steps in order: 1) SET TO LOW POWER 2) MOVE STAGE UP TO NOSEPIECE 3) GET LIGHT, SET DIAPHRAGM 4) CENTER SLIDE ON STAGE AND SET CLIPS 5) FOCUS AT LOW POWER 6) PLACE POINTER AT CENTER OF VIEWED OBJECT 7) CAREFULLY MOVE TO HIGHER POWER