Investigate how high radiant heat loss causes water vapor to condense into dew droplets
Dew formation.
Encyclopædia Britannica, Inc.
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Transcript
NARRATOR: The formation of dew is most pronounced on clear, still nights when radiant heat loss from exposed surfaces is high. As surrounding warmer moist air passes over cool surfaces, the air is cooled and its water vapor may exceed the saturation level. If so, the excess water vapor condenses as droplets onto the surfaces.