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STARTED PROCESS OF STUDYING
-LOOKING AT ALIVE
-ONE OF WATER
-REPLICATED IN NUMBER Anton van Leeuwenhoek (1632-1723)
• Good lens
• Choice of specimen THINGS IN HIS WORLD, SAW RED BLOOD CELLS, PEPPER INFUSION, SPERM
• Communicated his results to scientific community.
ROYAL SOCIETY OF LONDON, 100 PUBLICATIONS HAD DRAPERY SHOP
HOBBY: GRINDING LENSES, MADE SUPER SMOOTH LENSES
AROUND SAME TIME AS GALILEO, BUT GALILEO USES LENSES TO LOOK AT PLANETS RECOGNIZED BY SCIENTIFIC COMMUNITY,
INVENTED FIRST USUABLE MICROSCOPE Microscopy: THREE IMPORTANT FACTORS OF A GOOD MICROSCOPE • Magnification (enlargement of image...10 X)
ENLARGEMENT OF SPECIMEN • Contrast (difference between
image & background)
• Resolution (clarity of image)
HOW SHARP ARE EDGES
FOCUS=SHARP MARGINS Resolving power: The minimum distance
between two objects which can be
distinguished as separate and distinct.
MEASURE RESOLUTION WITH RESOLVING POWER Naked eye resolves about 0.1-0.2 mm (200 µ)
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This document was uploaded on 02/25/2014 for the course MICROBIOLO 101 at San Jose State University .
- Fall '14