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1. Always carry a microscope with one hand on the ________ and the other hand on the _________. 2. A microscope should be stored with the ________ objective.

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Presentation on theme: "1. Always carry a microscope with one hand on the ________ and the other hand on the _________. 2. A microscope should be stored with the ________ objective."— Presentation transcript:

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2 1. Always carry a microscope with one hand on the ________ and the other hand on the _________. 2. A microscope should be stored with the ________ objective in place. 3. Always bring a specimen into focus using the ___________ objective. 4. Never use the ____________ adjustment to focus the high-power objective. 5. Use only the __________ adjustment when focusing with the high-power objective. 6. Lenses should be cleaned with __________. 7.How is the magnification of a compound microscope determined?

3 NAMELOCATIONDESCRIPTIONFUNCTION OCULAR TOP OF MICROSCOPESINGLE LENS (10X) CAN BE REMOVED ENLARGES IMAGE OF SPECIMEN FOR VIEWING BINOCULAR HEAD BETWEEN OCULAR AND NOSEPIECE CONTAINS: OCULARS INTERPUPILLARY ADJUSTMENT INDIVIDUAL EYE FOCUS SPLITS IMAGE IN TWO ALLOWS ADJUSTMENT FOR USER’S EYES ROTATING NOSEPIECE ATTACHED TO UNDERSIDE OF BINOCULAR HEAD CHROME WHEEL INTO WHICH OBJECTIVES ARE SET ALLOWS CHANGING OF OBJECTIVES FOR DIFFERENT POWERS OF MAGNIFICATION OBJECTIVES ATTACHED TO NOSEPIECE 4 METAL CYLINDERS WITH DIFFERENT MAGNIFYING POWERS (4X-SCANNING, 10X-LOW POWER, 40X-HIGH DRY, 100X-OIL IMMERSION MAGNIFY IMAGE OF THE SPECIMEN FOR VIEWING (ALWAYS START WITH 4X OR 10X) STAGE (PLATFORM) UNDER THE OBJECTIVESFLAT SURFACE WITH HOLE IN THE CENTER MICROSCOPE SLIDE IS PLACED UPON THIS SURFACE FOR OBSERVATION MECHANICAL STAGE ATTACHED TO STAGEADJUSTABLE BY KNOBS AT SIDE; CLIP USED TO HOLD AND CONTROL MOVEMENT OF MICROSCOPE SLIDE MOVES THE SPECIMEN SLIDE UP AND DOWN, SIDE-TO-SIDE WITH KNOBS AT THE SIDE SUBSTAGE CONDENSER UNDER HOLE IN STAGEAN ADJUSTABLE (UP-AND-DOWN) SET OF LENSES (LIKE A “FLAT” OBJECTIVE) FOCUSES LIGHT FROM UNDERNEATH THROUGH THE SPECIMEN FOR VIEWING IRIS DIAPHRAGM INSIDE THE CONDENSERCAMERA-LIKE OPENING WHICH ADJUSTS WITH SMALL LEVER REGULATES THE AMOUNT OF LIGHT FOCUSED UPON THE SPECIMEN ARM AT BACK (“SPINE” OF THE MICROSCOPE STRONG SUPPORTING PART OF MICROSCOPE USED AS A “HANDLE” FOR CARRYING THE MICROSCOPE BASE (FOOT) BOTTOM-MOST PART OF THE MICROSCOPE PART UPON WHICH THE MICROSCOPE SITS CONTAINS A LIGHT SOURCE AND SWITCH(ES) TO CONTROL THE BRIGHTNESS COARSE FOCUS BOTH SIDES OF ARM NEAR LOWER PART OF MICROSCOPE LARGEST KNOBS ON BOTH SIDES OF THE ARM INITIAL, RAPID FOCUSING OF THE IMAGE OF THE SPECIMEN FINE FOCUS AT THE TIPS OF THE COARSE FOCUS KNOB SMALLER KNOBS WHICH TURN MORE EASILY THAN COARSE FOCUS KNOBS CRITICAL FOCUSING TO SHARPEN THE IMAGE OF THE SPECIMEN (“FINE-TUNING”)

4 E. coli B. cereus S. aureusS. epidermidis


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