Question

Which of the following is used to focus the electrons when using an electron
microscope?​

Answer 1

Answer:

is to use magnetic lenses to focus the electrons. Devices that use this principle are called electron microscopes. As shown in Fig. 17-7, the arrangement of magnetic focusing coils in an electron microscope is similar to the arrangement of glass lenses in an optical microscope.

Answer 2

Answer:

Electron microscope is the answer