2. Diaphragm - Controls the amount of light passing through the opening of the stage and into the microscope.
3. Stage - Supports the slide being used. You place the slide on it.
4. Mirror or Light - Reflects or shines light upward through the diaphragm to illuminate the specimen.
5. Nosepiece - Holds the different objective lenses; allows the lenses to rotate for viewing.
6. Base - Supports the microscope. One hand is placed under this when carrying the microscope.
7. Eyepiece - Contains a lens that magnifies about 10X. You look through this.
8. Fine Adjustment Knob - Moves the stage or body tube for focusing with the high-power objective lens. Focuses for details.
9. Course Adjustment Knob - Moves the body tube or stage for focusing with the low-power objective lens.
10. Objective Lens - Magnifies the object from 4X to 40X.
11. Stage Clips – Hold the slide in place on the stage. Know how to find the total magnification of a compound microscope.
(Magnification of Eyepiece X Magnification of Objective Lens = Total Magnification) Know that you always start with the low power objective lens when viewing a specimen with a microscope. Know how to use the pointer to be sure your specimen is centered in your field of view. Know how to care for and carry a microscope. When finished using a microscope: Turn it off.
Unplug it and wrap the cord up.
Cover it.
Move it to the back of the counter.
If you need to carry it, use two hands and place one under the base and the other on the arm.
For the lab test: Be able to focus an object clearly under high power and center it in the field of view without any assistance. Be able to make a proper scientific drawing of an object that you are viewing through the microscope.
¾ Be sure that your drawing is proportional to the object in the field of view.