The ___ is the area of the microscope between the tube and the base.
Arm
The ____ is the bottom that supports the structure of the microscope.
Base
The ___ refers to the main section of the microscope minus the stand (base) or any illuminators. It includes the eyepiece and objective lenses but not the focusing block.
Body
The ___ is the larger of two adjustment knobs that moves the objective lens closer to, or farther from, the specimen in large steps.
Coarse Focus
A ____ is typically a five-hole disc housed under the stage to adjust the amount of light passing through the stage opening.
Diaphragm
The ___, also known as ocular lenses, are typically 10x but also come in 5x, 15x, and 20x varieties. They are what you look through to see your specimen.
Eyepiece Lenses
The ___ is the smaller of two adjustment knobs that move the objective lens closer to, or farther from, the specimen in very small steps. It can be used to fine-tune the focus on various parts of a specimen after first using the Coarse Focus to get close.
Fine Focus
____ is the structure that holds the objective lenses. Rotating it allows the objective lens to be switched.
Nose Piece or Revolving Nose Piece, also Turret
____ is the lens closest to the object being viewed.
Objective Lens
What are the different magnifications? (4)
- Scanning (4x)
- Low Power (10x)
- Mid-Power (40x)
- High-Power (100x)
The ____ controls the power to the microscope.
On/Off Switch
The ____ is the main, flat plate that holds the slides for observation.
Stage
Each lens has a specific, color-coded band that denotes its resolution. Enumerate. (4)
- Red (4x)
- Yellow (10x)
- Blue (40x)
- White (100x)
How to calculate the total magnification of an image?
Multiply the power of the eyepiece by the power of the objective lens.
10x (Eyepiece) x 40x (Objective Lens) = 400x TM
Most lenses are used dry or without oil. Some lenses use a special time of oil to increase their resolution called ____, typically used with high powered lenses such as a 100x.
Immerion Oil
Once immersion oil is added to a slide, should the objective lens be switched back to a non-oil lens?
No. The objective lens should not be switched back to a non-oil lens.
How to properly hold a microscope?
Grip the arm firmly with one hand while placing the other underneath the base of the device for support.
How to properly clean a lens?
Never touch a lens with your bare fingers, oil from the fingers may smudge or the fingers may leave scratches. If to clean a lens, use appropriate lens tissue.
How to properly put a microscope back in storage?
- Rotate the nosepiece back to its lowest power setting.
- Lower the nosepiece to its lowest position on the stage.
- Neatly wrap power cord.
- Replace dust cover.
____ is a special paper cleaning material specifically designed to be used for cleaning lenses and other glass components without introducing scratches to the surface.
Lens Paper
