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Which condition is most suitable for radiation fog formation?

Answer and explanation

Correct answer: Long clear calm night with moist lower air

Correct answer: A. Radiation fog develops mainly when the ground loses heat by long-wave radiation during a clear night. A long night gives more time for cooling, calm conditions reduce mixing with warmer air above, and moist air near the ground reaches its dew point more easily. Tiny water droplets then remain suspended close to the surface. B is unsuitable because dry, hot, strong wind does not favour saturation and may disperse droplets. C describes daytime heating and convection, not the usual radiation-fog setting. D is unrelated to the atmospheric process that produces this fog. A useful cue is the three-part combination: night, moisture, and calmness, with clear skies allowing strong cooling.

Related tags

GeographyFogRadiation-FogDew-PointForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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