Census and viewing of organisms
Name: m hariaczyi
Date: Around 1993
How many organisms exist in the world today? What is the most
powerful microscope that could be used for viewing organism?
The most powerful microscope is called an electron microscope,
which can be used for viewing entire organisms, although few organisms are
small enough to see all of them at high magnifications allowed by this
microscope. So most often its used to look at fixed sections of organisms.
Since the electron microscope only works in a vacuum, with no air, you cannot
look at live organisms. To do that, probably the most powerful microscope is
called a Nomarski, or in technical terms, a "differential interference
contrast" microscope. This is a modification of a normal light microscope
that allows better contrast in living tissue. It is not any more powerful
than a light microscope, and is much less powerful than an electron
microscope, but it allows you to see living things much better.
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Update: June 2012