Why do rain filled clouds look black and Grey?

Answer 1

It's not that they are specifically 'rain-filled' as such. They are grey or black because the sun cannot shine through them very well, which is because they are very thick. Large masses of cloud are more likely to bring rain than light, fluffy, high clouds, which are white because they are insubstantial.

Answer 2

The reason why a rain cloud appears dark or gray in color is because when the sun is out, and there is moisture on the ground, what happens, the moisture gets evaporated, rises in the air because of the suns' rays and heat, forms into a cloud-like form, and as more and more evaporation occurs over a certain area, the clouds become denser, and more saturated with water molecules and droplets, that are constantly flying in various directions and give the appearance of a cloud. So the more moisture and evaporation that occurs the darker and more gray a cloud appears. Whereas if there is not as much evaporation or moisture rises, the lighter in color the cloud appears. Plus the heavier or darker the clouds look, also depends on the lifting of instability of the atmosphere. There is so much that goes into making a clouds appearance and structure that it would take 3 to 4 pages in college rule at a font of 12 to explain to you. But I hope this tidbit of info helped you out.

Answer 3

They are only gray because the thicker the cloud, the less sunlight that gets in, therefore the sun is not brightening the clouds to make them white. The less sunlight the grayer the cloud

Answer 4

because of the charges