A Read the text and find the synonyms for these words:

1 very thin (1)

2 approximatively (1)

3 to shine light on sth (1)

4 to make look larger (2)

5 last (2)

6 to start to be seen (2)

7 to determine (3)

8 to improve the quality (3)




B Read the text and answer the questions:

1 Which part of the electron microscope is used to direct the beam of electrons onto the specimen?

2 Which part of the EM controls focus?

3 Where usually is the specimen placed in the EM?

4 Does the beam of electrons pass first through the specimen or the objective lens?

5 How do we call the picture obtained by the EM?

6 What is the resolution and the magnification of the EM?

7 How do we improve the contrast?

8 What is the difference between positive and negative staining?