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Stage
provides a surface for the slide to be placed
Abbe condenser
directly under the stage with two sets of lenses that collect and concentrate light as it passes upward into the lens system
Body tube
above the stage and attached to the arm of the microscope. Houses the lens system. Upper end contains the ocular or eyepiece lens
How do you calculate total magnification
the number on the lens x 10
What does a higher numerical aperture mean?
the more light collected by the lens
what does refractive index measure?
how much light bends when it passes from one medium to another.
Why do we use immersion oil?
minimizes light refraction since it bends light less than air
When to use refractive oil
only on lens that say "oil"