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the history of MICROSCOPES

Explore the fascinating history of microscopes, from their humble beginnings with simple lenses in ancient times to the development of compound microscopes. Learn about the pioneers, such as Anton van Leeuwenhoek and Robert Hooke, who made groundbreaking discoveries. Discover the different types of microscopes, including the widely used light microscope and the powerful electron microscope. Understand the importance of magnification and resolution in microscopy.

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the history of MICROSCOPES

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

  2. the history of MICROSCOPES • ELECTRONMICROSCOPES: REFLECTED ELECTRONS FORM IMAGE • ALLOW EXTREMELY HIGH MAGNIFICATION • GIVES EXCEPTIONAL DETAIL • VERY EXPENSIVE • RESOLUTION: SHARPNESS OF IMAGE • DEPENDS LENS QUALITY, ABILITY TO FOCUS • ALLOWS GREATER DETAIL TO BE SEEN CLEARLY • MOST IMPORTANT ATTRIBUTE OF MICROSCOPE

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

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

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

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

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