Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
The electron microscope and biological advancement.
Member rating: No Rating | Words: | Submitted: Tue Sep 16 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
Toby Nicholson The electron microscope and biological advancement What is an electron microscope? An electron microscope does a similar job to an ordinary optical microscope that many people will have used before - it makes objects appear bigger. This is called magnification and lets one see details of very small objects, such as cell structures, which cannot be seen with the naked eye. In a normal optical microscope this is achieved by using higher-power lens that magnify the image more times. However, there comes a point at which magnification of an optical microscope does not show more detail. This is to do with the physical nature of light. Light is made up of particles (called photons) that travel in a wave. We can only see that two objects are separate if light can pass between them. Light can pass between the letters on this page so you can see them. When objects are...
To see the full version of this document, and 145,348 others
