methods of studying cells Flashcards
1
Q
what are the 3 types of microscopes ?
A
- optical (light) microscope
- transmission electron microscope
- scanning electron microscope
2
Q
define magnification
A
- magnification of a microscope is referring to how many times larger the image is compared to the object
3
Q
define resolution
A
- the minimum distance between two objects in which they can still be viewed as separate
4
Q
what is the resolution in an optical microscope determined by ?
A
- the wavelength of light
5
Q
what is the resolution in an electron microscope determined by ?
A
- the wavelength of the beam of electrons
6
Q
how is the image created in an optical microscope ?
A
- a beam of light is condensed to create the image
7
Q
how is the image created in electron microscopes ?
A
- a beam of electrons is condensed to create the image using electromagnets
8
Q
why do samples in an electron microscope have to be in a vacuum ?
A
- to prevent electrons being absorbed by air
9
Q
A
10
Q
A
