Question : Why are the clear nights colder than the cloudy nights?
Option 1: Conductance
Option 2: Condensation
Option 3: Radiation
Option 4: Insulation
Correct Answer: Radiation
Solution : The correct option is Radiation.
Because of differences in heat radiation and retention, clear nights are colder than cloudy nights. Clouds operate as insulators, preventing rapid cooling by minimizing heat escape from the surface. Clouds reflect solar energy during the day, which decreases at night, adding to the cooling of clear evenings.
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