File Name: parts and functions of microscope .zip
The optical microscope , also referred to as a light microscope , is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present compound form in the 17th century. Basic optical microscopes can be very simple, although many complex designs aim to improve resolution and sample contrast.
This section provides an overview of the parts of a petrographic microscope and what each part does. It is also a good review for a student who has used a petrographic microscope in a previous class but needs a refresher on the anatomy of a microscope. Look at the diagrams of the petrographic microscope and its parts in Figures 4. List all that you feel you completely understand how to use here:. In how many places is the thin section image magnified in a petrographic microscope? How do you determine the magnification of the image? Descriptions of the microscope parts, from top to bottom, are found in the list below or in these references:.
Microbiology, the branch of science that has so vastly extended and expanded our knowledge of the living world, owes its existence to Antony van Leeuwenhoek. In , with the aid of a crude microscope consisting of a biconcave lens enclosed in two metal plates, Leeuwenhoek introduced the world to the existence of microbial forms of life. Over the years, microscopes have evolved from the simple, single-lens instrument of Leeuwenhoek, with a magnification of , to the present-day electron microscopes capable of magnifications greater than , Microscopes are designated as either light microscopes or electron microscopes. The former use visible light or ultraviolet rays to illuminate specimens. They include brightfield, darkfield, phase-contrast, and fluorescent instruments. Fluorescent micro-scopes use ultraviolet radiations whose wavelengths are shorter than those of visible light and are not directly perceptible to the human eye.
Historians credit the invention of the compound microscope to the Dutch spectacle maker, Zacharias Janssen, around the year more history here. The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope versus an electron microscope.
Historians credit the invention of the compound microscope to the Dutch spectacle maker, Zacharias Janssen, around the year The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope vs. The simplest optical microscope is the magnifying glass and is good to about ten times 10X magnification. Basic parts of the microscope:. They are usually 10X or 15X power. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage. Stage clips hold the slides in place.
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