Vocab 10: The Microscope Flashcards
Base
Bottom of the microscope. Sturdy and flat.
Substage Light
Located in base. The light from the lamp passes directly upward through the microscope
Light control
Located on the base or arm. Adjusts intensity of light via a dial.
Stage
The platform slides rest on when they are being viewed.
Mechanical Stage
Holds the slide in position for viewing and has two adjustable knobs that control precise movement of the slide.
Condenser
Small nonmagnifying lens located beneath the stage that concentrates light on the specimen.May have a knob to raise and lower the condenser to vary light delivery.
Iris diaphragm lever
shutter within the condenser that can be conrolled by a leer to ajust the amount of light passing through. Closing the diaphragm can improve contrast.
Coarse adjustment knob
This knob allows you to make large adjustments to the height of the stage to focus on your specimen.
Fine adjustment knob
Allows precise focusing once the initial coarse focus as been completed
Head
Attaches to the nosepiece to support the objective lens system. Provides attachemtn of the eyepieces which house the ocular lenses.
Arm
Vertical portion of the microscope that connects the base and the head.
Nosepiece
Rotating mechanism connected to the head. Generally it carries three or four objective lenses and permits positioning of these lenses over the hole in the stage.
Objective lenses
These lenses are attached to the nosepiece, a compound micropscpe usually has four objective lenses. scanning, (4x) low power (10x) high power (40x) and oil immersion (100x)
Ocular lenses
Binocular microscopes will have two lenses located in the eyepieces at the superior end of the head. Most have a magnifying power of 10x.
What is TM?
TM is the magnifying power of the ocular lens x the objective lens.
