B1.1.4 Flashcards
1
Q
What is electron microscopy?
A
Electron microscopy use electrons instead of light to produce an image.
2
Q
Transmission electron microscopes
A
Pass a beam of electrons through a very thin slice of a sample. The beam is focused to make an image.
3
Q
Scanning electron microscopes
A
A beam of electrons passed across the surface. The reflected electrons are collected producing an image.
4
Q
Benefits of light microscopy
A
Cheap to buy and operate
Small an portable
Simple to prepare a sample
Natural colour of sample is seen unless staining is used
Specimens can be living or dead
5
Q
Benefits of electron microscopy
A
High resolution