[ ठंड में कोहरे के पीछे साइंस ]
Dainik Bhaskar Bureau,
Delhi-NCR is wrapped in a blanket of smog these days. Just smoke all around. But after a few days, as the winter deepens, this sheet will start becoming even denser. Because then fog will also get mixed in it. We all know that fog comes during winter and covers everything whether it is a city or a village. But ever wonder where it comes from? At that time there is not even enough rain to evaporate and form clouds in the sky. After all, why does fog come only during winter? The same question was asked on the online platform Quora. Do you know the correct answer to this? What is the science behind this? Let us know.
First of all, fog is common in winter. These days many states are in its grip. A user shared interesting information about this on Quora. Told that dew, mist, fog or all these are similar to each other. In winter, when the weather is cold, when the air comes in contact with the plants, the water present in the air gets deposited on the leaves in the form of small droplets, this is called dew. When water vapor present in the air condenses and floats in the air in the form of smoke, it is called fog. And when this mist becomes deep then it is called fog. Where there is more air pollution in cities, this fog becomes darker by sticking to the smoke. It is deeper near the ground so it is difficult to see. This mixture of smoke and fog is called smog. This is the whole story, but then the question remains that where do these dew drops come from.
This is how fog is formed –
When the steam released from water condenses into its gas form, it appears like fog. Small drops of water keep floating in the air. During summer, this gas remains in form and keeps flying above in the form of clouds. But during winter, due to cold, this vapor freezes and becomes heavy. Because of this, it is not able to rise much and takes the form of fog. When cold air meets light warm moist air over water bodies like rivers and seas, the moist air also starts cooling. Then the humidity reaches 100%. Only after this the process of fog formation starts.
Difference between fog and mist –
There is also a difference between fog and mist. Visually, both look similar because both are made of microscopic drops of water on suspended particles of air. There is a difference between them only due to the density of microscopic drops of water. Compared to fog, there are more microscopic water droplets in fog. From a scientific point of view, the visibility limit in fog remains less than one kilometer.
Dainikbhaskarup.com is now also available on WhatsApp channel. Follow today and get important news
: Language Inputs
This post is sourced from newspapers, magazines and third-party websites. For more information please check NewsDay Express Disclaimer.