Microscope
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What formula is used to determine microscopic magnification?
ocular lens power x objective lens power
How do you determine low power field of view?
measure the field diameter in mm, convert to micrometers
How do you determine medium power FOV?
low field diameter (in micrometers) x (low power magnification / medium power magnification)
How do you determine high power FOV?
low field diameter (in micrometers) x (low power magnification / high power magnification)
How do you calculate object size?
FOV diameter in micrometers / fit number (number of objects that fit in field)
How do you calculate drawing magnification?
drawing size (in micrometers) / object size (in micrometers)
What is a micrograph?
A picture taken with a microscope
What is the function of the eyepiece/ocular lens?
You look through it; magnifies the object.
What is the function of the tube?
Holds the eyepiece and the objective lenses at the proper distance from each other for functionality.
What is the function of the revolving nosepiece?
Rotating disk holds two or more objective lenses; turned to change lens.
What is the function of the objective lenses?
Magnify the object; each lens has a different power. There is a low, medium and high power lens.
What is the function of the arm?
Connects the base and the tube, used to carry the microscope.
What is the function of the coarse-adjustment knob?
Moves the tube up and down to bring the object into focus; only used with low power lens.
What is the function of the fine-adjustment knob?
Used with medium and high power lenses to bring the object into sharper focus.
What is the function of the stage?
Supports the microscopic slide. An opening in the centre allows light to pass through the slide.
What is the function of the stage clip?
Holds the slide in position
What is the function of the condenser lens?
Directs light to the object being viewed.
What is the function of the diaphragm?
Controls the amount of light reaching the object being viewed.
What is the function of the light source?
Shining a light through the object being observed makes details easier to see.