DEW: What is Dew | How Dew is Formed | What is Dewpoint | Where Does Dew Occur | What Prevents Formation of Dew |

Dew Formed on the Leaves.


What is Dew?
Dew is fresh, clean water droplets that form on the exposed surfaces close to the ground during morning or evening due to Condensation.

How Dew is Formed?

Dew Formed on the flower.

Under clear night sky and calm weather conditions, the exposed objects close to the ground such as grass, trees, spiderwebs, etc:- radiates heat faster into the atmosphere than it is replaced by other sources, as a result, these objects cool down. When the objects cool down than the air surrounding it also cools, this causes condensation that changes water vapor into liquid droplets. These all take place when temperature meets dewpoint and the dew is formed.

What is Dew Point?
The temperature at which Dew forms is called the Dew point. 

Where Does Dew Occur?

Dew Formation on the spiderweb.

Dew is observed in the humid locations in the tropics as this region consists abundance of moisture and the temperature also remains above the freezing point of water. As a result, when the temperature reaches a Dew point in the presence of a sufficient amount of water vapor in the air, Dew is formed. In Arid regions, Dew rarely forms due to a lack of moisture availability.

What Prevents Formation of Dew?

Dew Formed on the Grass.

1) Strong winds: It mixes different layers of air, consisting of different amounts of water vapor. This reduces the atmosphere's ability to form Dew.
2) Cold weather: when the temperature of the region reaches frost point (0°C), Dew cannot forms as the water vapor gets converted into ice and frost is formed.
3) Absence of moisture in the air.

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