Microbiology LAB
Exam #1
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
, Microscope- The Condenser - Answer: focuses the light ging into the objective lens
Microscope- The Iris Diaphragm - Answer: adjusts the amount of light going into the objective lens
Microscope- Nosepiece - Answer: holds the objective lenses and rotates to change from one objective to
another
Microscope- Coarse Objective Knob - Answer: moves the stage larger distances to help get the object in
focus
Microscope- Fine Adjustment Knob - Answer: moves the stage smaler increments to help get the object
in better focus
Microscope- Objective Lens - Answer: magnifies the object. It is located near the object.
Microscope- Occular Lens - Answer: magnifies the image of the object from the objective lens. It is
located near the eye.
Steps in using the microscope - Answer: 1) scanner power in place
2) place slide of specimen stage in place with stage clips
3) Using the course adjustment knob, raise the stage all the way up and then down slowly until you can
see image of specimen
4) Readjust with fine adjustment knob
Describe the purpose of the oil immersion lens - Answer: Used when oil is added to the slide. Oil must
touch the object and objective lens to that the light does not refract futher
Parfocal - Answer: Parfocal microscopes are able to move from one objective to the next and still be in
focus due to the length of the objective lenses
Resolution - Answer: The ability to distinguish between two objects that are very close together.
Exam #1
Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
, Microscope- The Condenser - Answer: focuses the light ging into the objective lens
Microscope- The Iris Diaphragm - Answer: adjusts the amount of light going into the objective lens
Microscope- Nosepiece - Answer: holds the objective lenses and rotates to change from one objective to
another
Microscope- Coarse Objective Knob - Answer: moves the stage larger distances to help get the object in
focus
Microscope- Fine Adjustment Knob - Answer: moves the stage smaler increments to help get the object
in better focus
Microscope- Objective Lens - Answer: magnifies the object. It is located near the object.
Microscope- Occular Lens - Answer: magnifies the image of the object from the objective lens. It is
located near the eye.
Steps in using the microscope - Answer: 1) scanner power in place
2) place slide of specimen stage in place with stage clips
3) Using the course adjustment knob, raise the stage all the way up and then down slowly until you can
see image of specimen
4) Readjust with fine adjustment knob
Describe the purpose of the oil immersion lens - Answer: Used when oil is added to the slide. Oil must
touch the object and objective lens to that the light does not refract futher
Parfocal - Answer: Parfocal microscopes are able to move from one objective to the next and still be in
focus due to the length of the objective lenses
Resolution - Answer: The ability to distinguish between two objects that are very close together.
