This is why it is advised not to turn on electronic devices immediately after transportation during cold weather. Then, after this thing is warmed, the condensed water becomes vapor again. For positive temperatures, it is dew, and for negative temperatures, it is ice or snow.įor example, if you bring something to a warm place immediately after it has been exposed to frost, the air close to the surface is cooled below the dew point, and condensed water appears. The further addition of water vapor or cooling of air leads to the appearance of condensed water. The dew point temperature is a saturation temperature, which means the relative humidity of the gas (air) is 100%.
The dew point is the temperature at which air must be cooled, at constant barometric pressure, for water vapor to condense into water.
