Home

Feature Article:

Camping Tent - Making Sure You Get the Right Size Tent
I had a neighbor that was looking to buy his small family a new camping tent to take on camping trips. He said he was just going to go and buy this 3-person, 3-season tent that he saw at the local mega outdoor store. I told him that he had the...
...Read More


What on earth are Electron Microscopes?

Additional Reading

Electron microscopes use "dancing" electrons rather than light to illuminate an object or sample. First developed in 1931 in Germany for laboratory use, it was not until 1965 that electron microscopes were available commercially. The first electron microscopes were produced by RCA.


So what kinds of things can you see with electron microscopes? Electron microscopes can reveal the following information.


1. Topography-What does the surface of the object or sample look like? Is it smooth? Rough? Hairy? Hard or soft?

2. Morphology-What are the shapes of the particles that make up the sample? Are they round, oval, square, triangle, or hexagonal? Is it made of strong or weak particles?

3. Composition-What elements or compounds is the object made of? Does it have oxygen or hydrogen in it? What is its' melting point or freezing point?

4. Crystallographic Information-What does the arrangement of the atoms look like? What are its properties?


Electron microscopes are capable of magnifying an object or sample up to one million times. This magnification allows scientists to use the electron microscopes to

distinguish individual molecules.


How do electron microscopes work? Electron microscopes work in the same way as lighted microscopes except that instead of light, electrons "dance" across an object or sample and illuminate it. Due to this beam's strength, fine detail can be seen including variations in its surface and what it is composed of. A vacuum is used to speed up the electrons until their wave-length is shorter than that of white light. The shorter wave-length allows higher resolution which results in fine detail.


These "dancing" electrons are then focused upon the object or sample and they form an image on the photographic plate. Although electron microscopes are quite advanced, one of the drawbacks to their use is that it cannot show movements that occur in living cells because of the high vacuum that is necessary to cause the electrons to pass across the sample.


There are two different kinds of electron microscopes. The Transmission Electron Microscopes or TEM's create an image by passing electrons through the object or sample. The Scanning Electron Microscopes or SEM's give more of a 3D look of an object or sample and the magnification is shown on a television screen which gives more depth detail.


To impress your friends with your knowledge of electron microscopes you need to learn just a few things. First, electron microscopes use beams of electrons to illuminate an object or sample rather than light. Secondly, electron microscopes can magnify an object or sample up to one million times which shows great detail. And lastly, electron microscopes are used by scientists, engineers and many others.

Looking at Microscopes
http://www.looking-at-microscopes.com

Take advantage of advances in technology with some light hearted reviews of devices designed to make our life easier. Here we look at microscopes: http://www.microscopes-reviewed.com/electronmicroscopes.html
Mike Spencer
http://www.electron-microscope-guide.com

 

More Reading:


Take a Hiking Pole on Your Next Hike

Applying Law of Gravity to Judo

Treadmill Reviews Top 3 Considerations When Reading Treadmill Reviews

SALACIA OBLONGA EXTRACT

21 Secrets of Fit People

 
A Kayaking Community at your Fingertips

The Black Dot Bullseye Difference

Gambling Isnt the Only Thing to do in Las Vegas

How To Choose A Home Exercise Equipment

40 000 a Year from Horse Racing Betting Systems


Horse Racing Betting, a Beginners Guide (Part 1)
So you want to bet on the horses but you havenít got a clue where to start. You look at the form but at this stage the numbers donít mean a thing. Well listen up as what Iím about to tell could result in a few winners today. First things first,...
...Read More

Benefits Of Laser Eye Surgery
Thereís so many benefits to being able to see naturally. Many people feel a new freedom to be able to simply wake up and see past the bed sheets. You can swim and play sports much easier. Plus, you wonít have to spend all that money for new contacts...
...Read More

How To Choose A Home Exercise Equipment
Technology in the 21st century has made life much easier to bear. Everything can be done with a mere touch of a button, whether the item is sitting right in front of us or some ten feet away. With such modern conveniences, is there any real time to...
...Read More

Modern Technology has Given us a Wonderful Range of Sports Sunglasses
Modern technology has given us a wonderful range of sports sunglasses frames and sports sunglasses lenses made to both enhance and stand up to the demands of the sports enthusiast with lightweight, flexible, durable materials, no-slip frames and a...
...Read More

Review of The Annual Glass Craft & Bead Expo in Las Vegas
Dear Stained Glass Enthusiast, I recently attended the 11 th Annual Glass Craft & Bead Expo in Las Vegas. It was a case of the sublime (a dazzling array of glass art) meeting the extremely tawdry (the City of Las...
...Read More