Analysis of cell component - Microscopes Flashcards
1
Q
define magnification
A
how much bigger the image is that the specimen
2
Q
define resolution
A
how detailed the image is
3
Q
magnification formula
A
image size/actual size
4
Q
what are the two types of mciroscopes
A
optical and electron
5
Q
what are the two types of electron microscopes?
A
scanning and transmission
6
Q
three features of scanning microscopes?
A
- scans a beam of electrons across the specimen knocks off electrons, gather in a cathode ray
tube to form an image - images show the surface
- resolution not as high as TEM
7
Q
three features of transmission em?
A
- uses electrons to focus a beam of electrons to form an image
- denser parts absorb more electron - darker
- images in black and white
- can see details of internal structures - have shorter wavelengths
