Final: Microscopes Flashcards
How should microscopes be carried?
With two hands, one on the arm of the microscope and the other in the base.
What type of material is used to clean microscope lenses?
Lens paper
What does the term parfocal mean?
A lens that stays in focus when magnification/focal length is changed
What characteristics must specimens have to be seen with a compound light microscope?
Small, flat, and mostly transparent
What happens when nontransparent specimens are placed under a compound light microscope?
They appear solid black
What are the two key features of the compound light microscope?
Magnification and resolution
What are the objective powers for all four objectives.
Scanning = 4X
Second smallest = 10x
Second largest = 40x
Oil lense= 100x
How do you calculate the total power of magnification?
Multiply the objective power by 10.
What is resolution?
The ability to distinguish 2 points as being separate
Why are compound light microscopes limited to a magnification of approximately 2,000x?
The image cannot be clearly resolved and the image looks more distorted as magnification increases
