Q2: Mircoscopes Flashcards
1
Q
Why can the beam of electrons be focused using electromagnets?
A
Electrons are negatively charged.
2
Q
Wavelength of an electron beam?
A
Very short
3
Q
What does the very short wavelength of the electron microscope mean?
A
It has a high resolving power
4
Q
Two types of electron microscope?
A
Transmission electron microscope
Scanning electron microscope
5
Q
Optical microscopes
A
Use light to form an image
6
Q
Optical microscopes resolution?
A
0.2 micrometers
7
Q
Can optical microscopes see nuclei?
A
Yes
8
Q
Optical microscopes magnification?
A
x1500
9
Q
Transmission electron microscope
A
Use electromagnets to focus a beam of electrons, which is then transmitted through the specimen.
