Your assignment is worth 50 points.
1 of 25
What property of a compound light microscope enables a person to change objectives without major focusing adjustments?
2 of 25
How does closing the iris diaphragm affect image brightness and contrast?
decreases brightness and increases contrast
increases brightness and decreases contrast
decreases brightness but has no effect on contrast
3 of 25
Which of the following objectives has the shortest working distance?
4 of 25
What effect will changing from the low power objective to the high power objective have on the field of view of a specimen?
5 of 25
If the letter p is placed under the microscope in the normal reading position, which of the following orientations of the letter would the viewer see?
6 of 25
Which of the following procedures should be done just prior to adjusting the diopter, when using the compound microscope?
Clean all lenses with lens paper
Turn the light on
Adjust the iris diaphragm
Adjust the fine focus
7 of 25
Two parts of the microscope that regulate the amount of light visible through the ocular are the:
fine and coarse adjustment knobs
ocular and objective lenses
illuminator and revolving nosepiece
condenser and iris diaphragm
8 of 25
Initial focusing of any slide is done under the:
scanning or low power objective
high power objective
oil immersion objective
depends upon the size of the specimen
9 of 25
Under which magnification would the distance between the objective and the specimen being observed be the least?
10 of 25
What is the total magnification produced by a microscope, using a 10X ocular lens and a 10X objective lens?
11 of 25
Which of the following describes proper microscope care and technique.
Be sure to carry the microscope upright, with one hand on the arm and the other under the base.
To protect the optics of the microscope, place it down gently and don't drag it across the tabletop.
Always begin focusing with the lowest power lens available.
Only use the coarse focus knob with the scanning and low power lenses.
All the above are examples of correct microscope care and technique. Question
12 of 25
Turning which of the following knobs moves the objective lenses the greatest vertical distance?
coarse focus knob
fine focus knob
13 of 25
Resolution is the ability to see two objects as separate.
14 of 25
Which of the following regulates the amount of light passing through the slide specimen on the microscope stage?
iris diaphragm lever
fine focus knob
15 of 25
An increase in magnification causes
a decrease in the field of view.
a decrease in the working distance.
a decrease in the depth of field.
all of the above.
16 of 25
Working distance is the
distance from your house to your job.
distance the microscope nosepiece travels using the coarse focus knob.
distance from the bottom of the objective lens to the specimen.
distance the specimen can travel across the microscope stage. Question
17 of 25
When adjusting a binocular microscope for differences between right and left eyes, focus the microscope with the fine adjustment while viewing only with the right eye (fixed ocular).
18 of 25
When using the oil immersion lens, you should rotate the objective lenses to the side for easy application of an oil droplet to the slide.
19 of 25
Why must a small object seen through the ocular lens...
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