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在我国民间流传着很多谚语,其中不少谚语不仅精炼明了、形象生动,还蕴含着丰富的物理知识。这里略举几例。1、霜前冷雪后寒春天和秋冬季节的夜晚,地面上的物体如草木、石块等的温度降得较快,如果温度降到0℃以下,空气中的水蒸气就凝结在这些物体上形成霜,因此,下霜前人们感到冷。雪是高空水蒸气遇强冷空气凝华后下降到地面的。下雪后,在阳光照射下,雪化成水,需吸收大量的热,使地面上方空气的温度降低,所以我们有雪后寒的感觉。
There are many proverbs circulating in our country. Many of them are not only refined and vivid, but also contain rich physics knowledge. Here are a few examples. 1, after the cold snow before the cold spring and autumn and winter nights, the temperature of objects on the ground such as vegetation, stones, etc., fell quickly, if the temperature dropped below 0 °C, the water vapor in the air will condense in these objects. The formation of frost, so people feel cold before the next frost. Snow is an upper-air water vapor that falls to the ground when it is cooled by strong cold air. After snow, in the sunlight, snow into water, need to absorb a lot of heat, so that the temperature of the air above the ground to reduce, so we have the feeling of cold after the snow.