What makes a thin stream of water jump into the dance, and what connects them without interruption? It is the Water Bridge Mystery. In the 19th century, a British engineer accidentally discovered an interesting phenomenon. If two beakers filled with water are energized, once they are close to each other, the water in the two cups will form a water bridge in the air.

This experiment is also very simple to operate. It only requires two beakers and some pure water. Pour the prepared pure water into a clean beaker. The water in the cup should be about three millimeters away from the mouth of the cup. One thing to note is that the water poured into the cup must be pure water without minerals, and the beaker must be placed in an insulated experiment. You can also put a layer of rubber mat on the table. After everything is ready, connect the positive and negative electrodes on the two beakers, and then connect the kilovolt direct current of the food. After the power is turned on, the water in the two beakers will automatically connect It rises up to form a water bridge, but the water tank is not static. Instead, the water in the positive electrode continuously flows into the beaker of the negative electrode, moving the distance between the beakers and adjusting the size of the current to change the thickness of the water ball. According to tests, when the voltage reaches 25,000 volts, the water tanks between the beakers can be 2.5 centimeters apart, which is very interesting.

Water in a 100 ml beaker can remain at this voltage for 45 minutes and then disconnect. It is precisely because during the charging process, the water temperature will rise from normal temperature to 60 degrees Celsius. Since the higher the water temperature, the easier it is to evaporate, the water tank will also be disconnected. And if the voltage is too low or the distance between them is too large, the water forming the water bridge will also be disconnected due to its own gravity. When the water tank is disconnected, the water flow that climbs to the mouth of the beaker will quickly fall back to a horizontal state. So why? Why will the water in the two beakers be connected to each other after being powered on? Although there is no reasonable explanation so far, scientists speculate that this may be related to high-voltage direct current.

After the water in the beaker is energized, the positive and negative poles are connected respectively, and high-voltage direct current will form a loop through the water tank. In this process, the high-voltage electric field makes the water in the positive beaker have a positive charge, and the water in the negative beaker has a negative charge. Once the beakers carrying positive and negative charges are close to each other, the water with different charges is almost attracted to each other. Some of the water will overcome its own gravity and climb upward. Once they meet, they will connect together to form a water bridge. As for why the water tank can stretch such a long distance, one theory is that it may be related to the tension of the dielectric. At high voltage, the voltage causes water molecules to align in pairs, creating a dielectric tension that keeps the sink from breaking. However, some scientists believe that this is the tendency of the water itself to shrink relatively. This force forms a surface tension that keeps the water tank from breaking. The two theories are in constant debate.