To get acquainted with the structure of the cell and examine its constituent parts, you need to use magnifying equipment, one of which is a light microscope.
The first microscopes were like magnifying glasses, and they used only one glass or a lens made of polished rock crystal.
Physicist and mathematician Galileo Galilei is considered one of the first creators (1610) of the microscope.
Greater technical capabilities and better image quality can be obtained with a dual lens microscope. The creation of such a device is associated with the name of the English physicist Robert Hooke (1665). This microscope was magnified 30 times.
For his time, the Dutch merchant Anthony van Leeuwenhoek (1632 – 1723) achieved excellent skill in the manufacture of microscopes. He knew how to produce lenses that magnify 200 – 270 times. The lenses were mounted on a special tripod, since in order to achieve this magnification, it is important that the object under study is exactly opposite the lens and at a certain distance from it. During his life, Leeuwenhoek made over 200 microscopes.
The structure of a modern light microscope
The body of the microscope is formed by the base and the tripod.
A stage is attached to the tripod and a tube is attached.
In the upper part of the tube there is an eyepiece through which the studied object is viewed, in the lower part of the microscope tube there are objectives.
The object in question is attached to the stage with clamps.
The light source is an important part of the microscope.
Illumination is controlled by a diaphragm.
A macroscrew and a microscrew are provided to move the stage.
How do you know the magnification of a microscope?
To enlarge the image in the microscope, 2 lenses (magnifying glasses) are used. One of them is in the lens and the other is in the eyepiece.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.