Light microscopes Flashcards
1
Q
What is an objective lens?
A
Produces a magnified image
2
Q
What is an eye piece lens?
A
Magnifies image from objective lens
3
Q
What is the benefit of 2 lenses?
A
Allows compound light microscope to produce greater magnification than simple light microscope
4
Q
How to calculate total mag of microscope?
A
Multiply eye piece lens mag by objective lens mag
5
Q
What is diffraction?
A
Where light bends as it gets close to the edge of an object. Can distort image
6
Q
What is magnification?
A
Process of making something look larger
7
Q
What is resolution?
A
Process of distinguishing between 2 separate points - stops image looking like 1 big blob
8
Q
How do you focus a microscope?
A
- Start with lowest objective lens + move stage up (coarse focus toward u)
- Move coarse focus away slowly
- Use fine focus to sharpen
9
Q
What is the cell theory?
A
- Plants + animals are composed of cells
- Cells are the basic units of life
- Cells develop from existing cells
