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In which condition is dew formation least likely?

Answer and explanation

Correct answer: Strong wind and cloudy night

Correct answer: D. Dew forms when a surface cools sufficiently for the nearby moist air to reach its dew point. Strong wind promotes mixing between the cooled surface air and warmer air above, while clouds act like a blanket and reduce the loss of terrestrial radiation at night. Together, strong wind and cloud cover make surface cooling and saturation less likely. A is favourable because a clear sky allows rapid radiational cooling and calm air limits mixing. B is favourable because air with high relative humidity needs only a small amount of cooling to reach saturation. C is favourable because strong cooling of grass can bring the adjacent air to the dew point. Memory cue: clear and calm help dew; cloudy and windy conditions oppose it.

Related tags

GeographyDewCloudy-NightWindForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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