3.2 The Electron Microscope

Question 1

What are the two types of electron microscope?

Answer 1

Scanning electron microscope & transmission electron microscope

Question 2

What is the TEM?

Answer 2

Electron gun which produces a beam of electrons

Question 3

What is the SEM?

Answer 3

Scans a focused electron beam over a surface to create an image

Question 4

Limitations of the TEM?

Answer 4

• Living specimens cannot be observed
• ‘Staining process’ required
• Thin specimen
• Image may contain specimens