What is a Simple Microscope?

1. Adjust the brightness: adjust the brightness from dark, you can use a large aperture, concave mirror, adjust the angle of the reflector.

Microscope operation

Right!

1. Adjust brightness: Brighten from dark, you can use large

1. Adjust brightness: Brighten from dark, you can use large

1. in

In the 17th century, it was discovered that the combination of two convex lenses can significantly improve the magnification ability. This device is the precursor of the microscope. The first real microscope was a combination of a convex lens and a concave lens, also known as a compound microscope. It was made by the Dutch optician Jensen and his son. Later, it was improved by the Italian astronomer Galileo. Better results.

The original microscope was very simple, it could only be magnified 50 to 200 times, and then it was continuously improved and gradually developed. The optical microscope can magnify the object to about 1500 times, and can observe the shape of bacteria.

In 1932, German scientists Knoll and Ruska made the world's first electron microscope in Berlin. Electron microscopes use electron beams instead of light beams, and magnetic fields instead of lenses to observe fine objects. The electron microscope suddenly increased the magnification to 10,000 times. By the 1990s, an electron microscope with a magnification of 2 million times had been developed in the world, and people used it to see the fine structure of matter inside. Seeing that all matter is composed of tiny and tiny particles that are invisible to the naked eye, the atomic world is discovered. In 1983, the scanning tunnel microscope was invented. This microscope is more advanced than the electron microscope. Since the invention of the scanning tunneling microscope, a new discipline born on the scale of 0.1 nm to 100 nm has been born in the world. This is nanotechnology.