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Why are dewdrops not formed on a cloudy night

,

Why are dewdrops not formed on a cloudy night?

(a)

Clouds absorb the radiation released from the Earth’s surface.

(b)

Clouds reflect back the Earth’s radiation.

(c)

The Earth’s surface would have low temperature on cloudy nights.

(d)

Clouds deflect the blowing wind to ground level.

Answer:

(b)

Moderate

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Explanation

During clear sky reflectivity of long wave radiation is maximum but the biggest single deterrent to radiation cooling is cloudy night. Water droplets present in the cloud absorbs radiations emitted by earth surface and reradiates some of the heat back again to earth thus, prevents dew formation.