Dew Wallpaper

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Dew is water in the form of droplets that appears on thin exposed objects in the morning or evening due to condensation. As the exposed surface cools by radiating its heat atmospheric moisture condenses at a rate greater than that at which it can evaporate resulting in the formation of water droplets.

When temperatures are low enough dew takes the form of ice this form is called frost.

Because dew is related to the temperature of surfaces in late summer it forms most easily on surfaces that are not warmed by conducted heat from deep ground such as grass leaves railings car roofs and bridges.

Dew should not be confused with guttation which is the process by which plants release excess water from the tips of their leaves.

Water vapor will condense into droplets depending on the temperature. The temperature at which droplets form is called the point. When surface temperature drops eventually reaching the point atmospheric water vapor condenses to form small droplets on the surface. This process distinguishes dew from those hydrometeors meteorological occurrences of water which form directly in air that has cooled to its point typically around condensation nuclei such as fog or clouds. The thermodynamic principles of formation however are the same. Dew is usually formed at night.

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