B3.1-3 Microscopes, Studying Cells Flashcards
(7 cards)
1
Q
What is magnification
A
How much bigger an image is compared to the actual object
2
Q
What is resolution
A
The ability to distinguish between 2 very close points as seperate
3
Q
Magnification formula
A
Image size/actual size
4
Q
Limitations of a light microscope
A
Low resolution and magnification
5
Q
How does a TEM work
A
Electrons pass through specimen and produce internal 2D images
6
Q
How does a SEM work
A
Electrons beam is scanned over a surface to form a 3D image
7
Q
What is cell fractionation and what are the 3 steps
A
A process to break open cells and separate organelles
Homegenisation
Filtration
Ultracentrifugation
