Question

Which of the following component of TEM focuses the beam of electrons on the sample?

• A. ( \text{Ocular lens} ) \
• B. ( \text{Condenser lens} ) \
• C. ( \text{Stage} ) \
• D. ( \text{Column} ) \

Hint:

In electron microscopy, think of the condenser lens as analogous to the condenser in a light microscope: both are responsible for illuminating the specimen by focusing the respective beam (electrons or light) onto it.

Answer 1

The Correct Option is B

A Transmission Electron Microscope (TEM) uses a beam of electrons to create an image of a sample.
The electron beam is generated by an electron gun.The electron beam then passes through a series of electromagnetic lenses that control its path and focus.
The condenser lens (or condenser system) is responsible for focusing the electron beam onto the specimen.
It controls the illumination of the sample.The ocular lens (or projector lens) is used to project the magnified image onto a screen or detector.
The stage is where the sample is placed.The column is the evacuated chamber within which the entire electron optical system operates.