Traditional Culture Encyclopedia - Photography and portraiture - Why can water strider, a Hemiptera, walk freely on the water?
Why can water strider, a Hemiptera, walk freely on the water?
Water strider is so light that it can hardly break through the water film. Through physical experiments, it can be found that when a light and dry object is thrown into water, it will only press out a pit on the water surface when the water does not completely soak the object, because there is a water film that people can observe with the naked eye. The main reason for this phenomenon is that there is a very regular structure where water molecules contact air, just like a film on the surface, which can prevent water molecules from contacting air. It is also for this reason that anything can float on the water before the water film breaks.
Water strider's weight is very light, almost negligible, and its weight does not exceed the tension of water film, in this case. Water strider will hardly break through the water film on the water surface. If you look at it with the naked eye, you can find that water strider's limbs just pressed the water mill down four pits. In this case, the water surface is like the land of water strider.
The presence of bristles can also prevent water strider from getting wet. In this case, water strider can move freely on the water. Scientists made an in-depth study of water strider and found that water strider's body was covered with a layer of bristles. Although it is invisible to the naked eye, it can be observed clearly with the help of a high-power microscope. This layer of structure can play a role similar to goose and duck feathers, and there will also be air components inside. In this case, when water strider walks on the water, he doesn't have to worry about myopia.
The researchers also conducted in-depth research on water strider's bristles, and found that there is a very special spiral structure above the bristles, which can form a special air cushion. The researchers found that the air cushion formed on each leg of water strider was enough to support the pressure of 0/5 times its own weight/kloc-,while water strider had six legs. The air cushions on these six legs can ensure that water strider can move freely on the water. Just like a water walker has a boat. In this case, the water surface is like the land of water strider. It can move freely on water, which is far more convenient than on land.
Generally speaking, any object that wants to sink on the water surface must be soaked by the water surface before it can break through the water film. Water strider has a special body structure, so it is very difficult to break through the water film. In this case, even if water strider wants to enter the water, he is facing great difficulties. Actually, it can't sink at all.
Water strider pushes the water hard, which provides a source of strength for his jumping. The force is mutual, and only enough thrust can ensure water strider to walk on the water. Anyone who has seen this insect will be surprised at its speed.
On the water, it usually jumps and walks, and the height of each jump can reach 30~40 cm, which is about 20 times its body length. The main reason for this phenomenon is that water strider pushes the water very hard, which can provide enough power for them to jump on the water. If human beings have such a great driving force, they can easily jump into a building tens of meters high, just like the flying skill in martial arts novels.
Water strider can walk freely on the water, mainly because of its special body structure. In fact, water strider has many mysteries, which are worth studying. With the deepening of research, I believe it will also inspire people to develop some bionic vehicles to meet people's diverse travel needs.
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