Life buoys and vests used on seagoing vessels are equipped with light bulbs that automatically flash when exposed to water to send flash signals for help. This bulb has an automatic switch integrated into the battery pack. Normally the switch is off and the bulb does not light up. During use, if the life jacket or life buoy falls into the water, the bulb battery device will be immersed in the water. The conductivity of the water is used to automatically turn on the bulb's power switch - and the bulb lights up.
Will a light bulb explode when exposed to water vapor?
If your lamp is always on, it will not explode because the water mist slowly adheres to the surface of the bulb and will not cause a sudden temperature difference. If your lamp is lit from behind, water on the surface of the bulb and theThermal energy generated by the filament when the light is on can cause it to explode if there is a big difference. However, people won't do it. electrocuted by moisture because the voltage is too low, only 220 V. If so, excessive pressure can be dangerous.
Under normal circumstances, ampoules do not explode on contact with water vapor. Bulb explosions occur due to sudden cooling and sudden heating, as well as drastic changes in temperature causing the bulb glass to break. For example, a hot light bulb is suddenly doused with cold water. It's the same as filling a glass with boiling water in winter. Additionally, even if the bulb explodes, the filament will burn out instantly. Since the humidity in the air (water vapor) is far from supersaturated, there will be no air conduction incidents or injuries. Another point to note: in fact, water (H2O) does not conduct electricity. The so-called daily conductivity of water is due to the fact that ordinary water contains a large number of conductive particles, such as zinc, magnesium, iron, calcium and other impurities, among others. conductive ions. Water becomes an electrical conductor. Pure water does not conduct electricity.