Lab 3 Study Guide
Condenser
Small substage lens that concentrates the light on the specimen
Stage
The microscope slide rests on the ___________ while being viewed.
Stage
The platform the slide rests on while being viewed
Your lab microscope is parfocal. This means that:
The slide should be almost in focus when changing to higher magnifications
Arm
Vertical portion of the microscope connecting the base and head
Base
Supports the microscope
If the ocular lens magnifies a specimen 10X, and the objective lends used magnifies the specimen 35X, what is the total magnification being used to observe the specimen?
350X
Objective lens
Adjustable lens system that permits the use of a scanning lens, a low-power lens, a high power lens, or an oil immersion lens.
You should always begin observation of specimens with the oil immersion lens? True or False
False
Iris diaphragm lever
arm attached to the base of the condensor that regulates the amount of light passing through the condensor. The iris diaphragm permits the best possible contrast when viewing the specimen
Sub-stage light or mirror
located in the base. In microscopes with a sub-stage light source, the light passes directly upward through the microscope: light controls are located on the microscope base. If a mirror is used, light must be reflected from a separate free-standing lamp
Ocular
observations are made through this piece, allowing you to view the specimen
Nosepiece
rotating mechanism at the base of the head. Generally carries three of four objective lens and permits sequential positing of these lens over the light beam passing through them
Head or body tube
supports the objective lens system, which is mounted on a movable nose-piece, and the ocular lens or lenses.
Fine adjustment knob
used for precise focusing once course focusing has been completed
Coarse adjustment knob
used to focus on the specimen
How do you clean the lenses of your microscope?
with isopropyl alcohol and lens paper