1. The first microscope was invented by the Dutchman Zaharias Jansen in 1590, more than 400 years ago.

2. Microscopes can have magnifications of 1000 times or more, and ordinary light microscopes generally have magnifications between 40 and 1000 times.

3. The most powerful electron microscope in the world can see objects in the size of 0.05 nanometers, while the diameter of a single hair is about 75,000 nanometers.

4. A transmission electron microscope photo can take hours or even days to take because it requires cutting the sample into very thin fragments.

5. Microscopes can not only magnify objects, but also help us find bacteria and microorganisms that are invisible to the naked eye. Robert Hooke first observed cells through a microscope in 1665.

6. Modern scientists use scanning tunneling microscopy (STM) can "see" atoms, with a resolution of 0.1 nm, almost the size of an atom.

7. There are many types of microscopes, in addition to common optical microscopes, there are electron microscopes, laser confocal microscopes, etc. Each microscope is suitable for different research fields.

8. Microscope lenses are usually made of optical glass, which has been precisely polished to greatly reduce optical distortion, thus providing a clearer image.

9. The wavelength of light used in optical microscopy limits its maximum resolution, about 200 nm, and cannot see objects smaller than this.