Microbiology lab practical Exam 2026
Questions and Answers
bright field microscopy - Correct answer-light rays pass directly to the eye without
being deflected in the condenser
microscope arm - Correct answer-the portion of the microscope that connects the
lenses to the base
microscope ocular - Correct answer-eyepiece
microscope diopter adjustment ring - Correct answer-on the ocular, used to make
image sharper
Microscope Nosepiece - Correct answer-holds the objective lenses and rotates to
change from one objective to another
objective lens - Correct answer-The lens on a light microscope that is closest to the
stage.
Microscope Coarse Adjustment Knob - Correct answer-Moves the stage up and
down for focusing
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, Microscope Fine Adjustment Knob - Correct answer-Moves the stage slightly to
sharpen the image
mechanical stage microscope - Correct answer-consists of spring clips or clamps to
hold a slide in position
microscope diaphragm - Correct answer-controls the amount of light reaching the
slide
microscope condenser - Correct answer-small substage lens that concentrates the
light on the specimen
10x lens - Correct answer-low power lens
40x lens - Correct answer-"high-dry" lens
The 40X lens is called the 'high dry' lens. Why do we call it that? - Correct answer-
high objective, but no oil required
100x lens - Correct answer-oil immersion lens
resolving power formula - Correct answer-d = 0.5λ/NA
stage micrometer - Correct answer-has lines etched on it that are exactly .01 mm
(or 10 μm apart)
Winograsky column - Correct answer-
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Questions and Answers
bright field microscopy - Correct answer-light rays pass directly to the eye without
being deflected in the condenser
microscope arm - Correct answer-the portion of the microscope that connects the
lenses to the base
microscope ocular - Correct answer-eyepiece
microscope diopter adjustment ring - Correct answer-on the ocular, used to make
image sharper
Microscope Nosepiece - Correct answer-holds the objective lenses and rotates to
change from one objective to another
objective lens - Correct answer-The lens on a light microscope that is closest to the
stage.
Microscope Coarse Adjustment Knob - Correct answer-Moves the stage up and
down for focusing
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
, Microscope Fine Adjustment Knob - Correct answer-Moves the stage slightly to
sharpen the image
mechanical stage microscope - Correct answer-consists of spring clips or clamps to
hold a slide in position
microscope diaphragm - Correct answer-controls the amount of light reaching the
slide
microscope condenser - Correct answer-small substage lens that concentrates the
light on the specimen
10x lens - Correct answer-low power lens
40x lens - Correct answer-"high-dry" lens
The 40X lens is called the 'high dry' lens. Why do we call it that? - Correct answer-
high objective, but no oil required
100x lens - Correct answer-oil immersion lens
resolving power formula - Correct answer-d = 0.5λ/NA
stage micrometer - Correct answer-has lines etched on it that are exactly .01 mm
(or 10 μm apart)
Winograsky column - Correct answer-
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
