Micro lab test 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| microscope | used to view very small objects
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| 2 kinds of light microscopes | binocular dissecting microscope
compound light microscope
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| binocular dissecting microscope | used to study entire objects in 3 dimensions at low magnification
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| compound light microscope | used to examine small or thinly sliced objects
illumination is from below, light passes through clear sections but not opaque
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| eyepiece | occular lens
topmost series of lenses
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| magnifying power of occular lens | 10
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| body tube | conducts light rays
holds nosepiece and eyepiece
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| arm | supports upper parts
provides carrying handle
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| scanning power objectives | magnifying power-40
holds scanning lenses used to view whole slide
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| low power objective | magnifying power of 100
holds low power lens to view object in greater detail
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| high power objective | magnifying power of 400
holds high power lens to view objects in greater detail
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| oil immersion objective | magnifying power of 1000
holds oil immersion lens used in conjunction w oil immersion to view objects w the greatest mangnification
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| course adjustment knob | used to bring object into approximate focus
used only w low 40 power objective
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| fine adj. knob | used to bring object into final focus
used w low, high, and oil immersion lens
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| diaphragm or diaphragm control lever | controls the amount of illumination
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| light source | attached lamp that directs a beam of light up through object, adjust intensity by rheostat button on side
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| base | flat surface of microscope that rests on table
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| stage | holds and supports microscope slides
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| mechanical stage | moveable stage that aids in accurate positioning of slide
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| mechanical stage control knobs | two knobs forward/reverse movement,right/left movement
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| objective power of: scanning, low power, high power, oil immersion | 4,10,40,100
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| total (x10) magnification and color of: scanning, low power, high power, oil immersion objectives | 40 red course
100 yellow, fine
400 blue, fine
1000 white, fine
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| inversion | images appear upside down and reversed
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| parfocal | compound microscopes
keeps in focus what is in the center
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| diamater of field | the circle visible through the lens
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| how do you convert from millimeters to micrometers | multiply the millimeter value by 1000
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| 3 sources of light | condenser-on the left,under the table rheo stat- red dial on left
iris diaphram- knob under table
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| meter | primary unit of measure
approximately 3 feet
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| 1 meter= ? centimeters | 100 centimeters
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