The parts and function of electron microscope?

Answer 1

eyepiece

body tube

coarese adjustment

fine adjustment

revolving nose piece

objective

arm

stage clip

stage

inclination joint

base

mirror

diagraph

Answer 2

To form an image, a scanning electron microscope works by using electrons instead of light. The construction of the microscope includes an electron gun, electron beam, anode, magnetic lens, scanning coils, backscattered electron detector, and a secondary electron detector that sit on a stage that holds the specimen.

Answer 3

ELECTRON GUN

An electron gun (also called electron emitter) is an electrical component that produces an electron beam that has a precise kinetic energy and is most often used in television sets and computer displays which use cathode ray tube (CRT) technology, as well as in other instruments, such as electron microscopes and particle.

ELECTRON BEAM

Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite of the negative electrode is observed to glow, due to electrons emitted from and travelling perpendicular to the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicist Johann Hittorf, and were named in 1876 by Eugen Goldstein kathodenstrahlen, or cathode rays.[1]

ELECTRON BEAM POSITIONING

`

BEAM DIAMETER REDUCTION

FOCUSING LENSES

VISUAL TRANSMISSION

VACUUM MANIFOLD

CONDENSER

APARTURE CHANGER

APERTURE DIAPHRAGM

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STAGE

VACCUUM CHAMBER

Answer 4

1. Eyepiece

Contains a magnifying lens that focuses the image from the objective into your eye.

2. Course Adjust

For focusing under low magnification

3. Fine Adjust

For focusing under high magnification or low

4. Low Power Objective

For large specimens or overview

5. High Power Objective

For detailed viewing or small specimens

6. Specimen on glass slide

What you want to look at

7. Stage

Supports specimen in correct location to lens

8. Condenser

Focuses the light on specimen

9. Diaphragm (iris or disc)

Regulates amount of light and contrast

10. Light Source

Illuminates the specimen for viewing

Answer 5

parts and function of electron beam positioning

Answer 6

In an electron microscope, a stream of electrons takes the place of a beam of light and allows us to see things smaller even than light itself. A SEM produces images that appear 3-D.