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Why do dark rain clouds appear darker than ordinary clouds?

Answer and explanation

Correct answer: They block more light because they are thicker and water-rich

Correct answer: A. A rain cloud usually contains a greater depth of condensed water droplets and sometimes ice particles than a thin ordinary cloud. Sunlight entering the cloud is scattered and absorbed many times. Because the cloud is thick and water-rich, less light passes through its lower surface and reaches an observer on the ground. The underside therefore looks dark, especially when the Sun is behind or above the cloud. A is correct because thickness and water content reduce transmitted light. B is wrong because rain clouds can form during daylight as well as at night. C is wrong because cloud particles are essential to cloud formation and rain clouds contain many droplets or ice particles. D is wrong because clouds form in the atmosphere, not above the Sun. Memory cue: a thick, water-loaded cloud lets less sunlight through, so it looks darker from below.

Related tags

Dark CloudsRain CloudsCloud ThicknessLight ScatteringClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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