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气体在一定温度下所能容纳的水蒸汽含量是有限的,一旦超过额定值,多余的水蒸汽就会从气态转变成液态,形成结露。夏季里,人们会发现盛放冰镇饮料的玻璃杯外壁会凝结一层水珠,这就是由于玻璃杯周围的水蒸汽遇低温后达到饱和而产生的结露现象。此外,在秋天的早晨,田边草地上的露水,也是由于夜间气温下降,使地面空气中的水蒸汽达到饱和而在草上结露所致。要检测空气中的水蒸汽含量是否达到结露的程
The amount of water vapor the gas can hold at a given temperature is limited. Once it exceeds the rated value, the excess water vapor will change from a gaseous state to a liquid state, forming condensation. In the summer, people will find that the outer wall of the glass containing iced beverage will condense a layer of drops of water, which is caused by condensation of water vapor around the glass when it reaches low temperature. In addition, on the autumn morning, the dew on the grasslands on the fields was also caused by dew condensation on the grass due to the temperature drop at night which saturates the water vapor in the surface air. To detect whether the water vapor content in the air to reach the condensation process