Electron Microscope

Question 1

What are the two types of electron microscopes?

Answer 1

1. Transmission Electron Microscopes
2. Scanning Electron Microscopes.

Question 2

What does the transmission electron microscope do?

Answer 2

The transmission electron microscope SHORTENS the wavelength in comparision to light by USING beams of ELECTRONS.

Question 3

Specifically, what exactly does the TEM use?

Answer 3

It uses electromagnets that create an electromagnetic field to control the path of the electron beam.

Question 4

What evidence does the TEM sugeest about cell theory?

Answer 4

1. Cells contain hereditary information
2. All cells have the same basic chemical composition.
3. All energy flow of life occurs within cells.

Question 5

What is a negative of electron microscopes?

Answer 5

The size, expense and maintainece limits the accessibility to researchers and universities.

Question 6

What view does a scanning electron microscope provide?

Answer 6

A scanning electron microscope provides detailed images of surfaces.

Question 7

What does a scanning electron microscope do?

Answer 7

The scanning electron microscope bombards solid specimens with a beam of electrons which causes secondary electrons to be emitted from the surafce layers of the specimen.

Question 8

Which has a poorer resolution? Scanning or Tunneling?

Answer 8

The scanning electron microscope has a poorer resolution (of about 10nm) than a tunneling electron microscope.