2006-08-23 21:54:17 · 17 answers · asked by Anonymous in Science & Mathematics ➔ Weather
It depends on the concentration of water vapour in the cloud...The darker the cloud, the more water vapour and the more likely it is to rain.
2006-08-23 21:56:55 · answer #1 · answered by Anonymous · 4⤊ 0⤋
What influences the colour of clouds?
Light from both the sky and from clouds is sunlight which has been scattered. In the case of the sky, the molecules of air (nitrogen and oxygen) undertake the scattering, but the molecules are so small that the blue part of the spectrum is scattered more strongly than other colours.
The water droplets in the cloud are much larger, and these larger particles scatter all of the colours of the spectrum by about the same amount, so white light from the sun emerges from the clouds still white.
Sometimes, clouds have a yellowish or brownish tinge ⬠this is a sign of air pollution.
this a site wich explain in detail how the clouds are formed. good reading
2006-08-24 05:05:11 · answer #2 · answered by Hades et Persephone 7 · 0⤊ 0⤋
In the meantime, clouds are collections of tiny water droplets and ice crystals. Each of those droplets and crystals will reflect each color of light equally, combining to make them appear white
As for what causes our familiar gray clouds around the Northwest? That's caused by higher clouds casting their shadow on lower-based clouds, or that the clouds are so dense that their top parts absorb most of the sunlight, casting their own shadow along their base, making them dark on the bottom (the part you see.)
2006-08-24 05:01:56 · answer #3 · answered by aliciamarie88 2 · 1⤊ 0⤋
I would have thought that the gray ones are that colour because they're denser or thicker or bigger and therefore let less sunlight through, making them appear darker. Don't forget, if you up in a plane looking down on clouds, they're all the same colour.
2006-08-24 05:03:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It's because darker clouds have more water in them and more matter to reflect light with. Also, the taller a cloud is, the more matter it has to reflect light with, making it darker.
2006-08-24 12:47:49 · answer #5 · answered by dwana49 2 · 0⤊ 0⤋
cause white clouds mean sun and grey clouds mean rain or some other bad weather
2006-08-24 08:38:06 · answer #6 · answered by tamzin b useful today 2 · 0⤊ 0⤋
grey clouds are the ones that bring the rain simple as that
2006-08-24 05:07:10 · answer #7 · answered by tjunsworth 2 · 0⤊ 0⤋
What wonderful answers you have already have, the scientific ones are correct, the others are witty and good, the best in my opinion is of course the one about the silver lining - keep smiling
2006-08-24 05:57:52 · answer #8 · answered by Barry G 2 · 0⤊ 0⤋
The black clouds are always over my head.
2006-08-24 05:01:18 · answer #9 · answered by Tim C 4 · 0⤊ 0⤋
Just to console you that 'Every cloud has a silver lining'.
2006-08-24 05:07:05 · answer #10 · answered by Hobby 5 · 0⤊ 0⤋