There are many kinds of microscopes. The most basic straight tube optical microscope used in students’ experiments to the transmission electron microscope, scanning electron microscope, various combinations of accessories, light path, dyeing methods, etc. Such as darkfield, phase contrast, inversion, posture, fluorescence, laser confocal, etc. In a word, microscopes are specialized in many fields.
Of course, there are many essential performances, simple structures, and cheap and portable style. So which one should we choose for the kids?
First of all, it is suggested to abandon the idea of buying a “professional” microscope.
Although the general laboratory teaches with a little more professional microscope, only a hundred dollars can be done, but this is unnecessary. Even if we want to buy a microscope, the purpose of this stage is to make children interested in the micro-world and see the various microstructures of common objects in life, rather than doing any real research.
Therefore, it is not necessary to keep improving the accuracy, color, and resolution. The microscope, which is a little more professional, is mainly made of metal. It is often heavy for children, and it won’t be easy to carry. It is easy to get injured, and the equipment will be damaged.
In addition, the objective magnification of about 40 times is enough; there is no need to pursue high magnification.
The next level, 100 times the objective lens, needs to use cedar oil as a medium between the lens and the cover glass. Afterward, it needs to use xylene and other solvents to clean, and xylene is not very good for the body.
Besides, when the oil mirror is working, it is very close to the cover glass. If the child is not familiar with the operation, it is easy to screw it up to smash the cover glass, slide glass and even damage the lens. For children, a stereomicroscope with low magnification is also a suitable choice.
Also, you can choose the one with the light source.
On the experimental platform, there is usually a ready-made light source with suitable height. The microscope with a mirror used in experimental teaching can be seen by moving it out and adjusting the mirror. You can move the microscope to the window at home or find a lamp or flashlight to illuminate the specimen.
Some children’s microscopes have their light source, which is much more convenient to use.
- Microscope is not just a toy. Although a microscope is more of a new toy for children, we should also tell children that the further development of observation means the further development of related disciplines. With the help of a microscope, “a humble insect becomes a monster Countless things have been found A new world has opened up. With the use of microscopes, many fields that seem to be unable to be hit by eight strokes have made outstanding achievements.
For example, with the help of the microscope, Maliki discovered the capillary circulation; Gru found the role of pollen, Swammerdam made clear the difference between the queen bee, worker bee, and drone.
- We must teach our children this and carry out systematic biology education. That’s the job of biology teachers. Our parents only need to make full use of the microscope to arouse children’s interest. It’s part of the wisdom of global science education experts.
Most of these concepts are the cornerstones of various disciplines. They are easy to understand and closely related to life. The seventh of them is that organisms are based on cells. So how do we do it?
First of all, when we buy a children’s microscope, we can add a little more money to buy a matching specimen set, which usually involves different tissues and organs of plants and animals, dividing cells, etc. After slicing, staining, and other steps, it will be very refreshing to observe.
They are all composed of similar microstructures to deepen children’s basic understanding of the cell-based structure of organisms. Also, we can take our children to make some simple specimens to verify. More common, such as human oral epithelial cell film, blood smear, temporary onion film, and so on, are easy to find out how to do. There is not much space.
- Some interesting observation objects if you buy a microscope can let children give full play to levinhock’s spirit of curiosity and explore the microstructure of daily things. The following is a brief list of several familiar and meaningful observation objects.
Seeing the screens that can display various dazzling images that are usually very familiar, it turns out to be composed of small light spots, which will make children very novel. At the same time, they will have a more intuitive understanding of “small” and “big.” I can also better understand the principles of inkjet printers and camera photosensitive elements.
Insect structure, the compound eyes, and bristles on the body surface of insects are excellent objects of observation, which helps children realize that the humble insects also have such complex structures.
When diatom takes the child to play in the park, we can let him take some water samples home with a mineral water bottle or something and examine them under the microscope on the premise of ensuring safety.
In the field of vision, we often see such small things. These are diatoms. There are many kinds of them, well structured and interesting to look at.