Different Types Of Microscopes

Question 1

How does a scanning electron microscope work?

Answer 1

•A beam of electrons is focused onto a specimens surface using electromagnetic lenses.
•Reflected electrons hit a collecting device and are amplified to produce an image on a photographic plate

Question 2

What’s the sem maximum magnification and resolution?

Answer 2

M= x500,000
R= 3-10nm

Question 3

How do transmission electron microscopes work?

Question 4

What are drawbacks to using electron microscopes?

Answer 4

•Expensive
•not suitable to view whole cells and tissues
•black and white images
•non living only
•large
•training required