reason for blue color for clouds?

Answer 1

The sky appears to be blue, clouds can be pretty much any shade of grey from the very light fluffy clouds to the really dark thunder clouds.

Fog is cloud at ground level so clouds are perhaps best described as being fog coloured.

Sometimes there are coloured particles in the air which can give the sky and clouds a coloured tint. This is often the case after a sand or dust storm whips up coloured dust particles, it can also happen after a volcanic eruption spews huge qualtities of ash and dust into the atmosphere.

Blue is the colour the sky appears but it doesn't actually have any colour. The colour is the result of the way that light from the sun is scattered. Sunlight is made up of all the colours of the rainbow and each different colour is a minute wave of differing length. The molecules and atoms in the atmosphere interfere with some of these waves and they're deflected. Other waves of colour are able to pass through the atmosphere uninterupted. So... some colours are scattered all over the place and others aren't; it's the mix of colours that reaches us which makes the sky appear to be blue.

The same principle explains why sunsets are red, yellow, orange etc - in this case the sun is low on the horizon, the sunlight strikes the atmosphere at an oblique angle and has to travel through more atmosphere before reaching us and so more scattering occurs.

For more information do a search for 'Rayleigh Scattering' and 'Mei Scattering'

Answer 2

Based on the nephology, the clouds are surrounded by billions of droplets or crystals and due to reflectance and the solar radiation coulds mostly just appear "White". If the the intensity of the solar radiation decreases, coulds will look "grey" or "dark". Of course the background is also an important parameter, but it is really very hard to see "blue cloud". The reason for this is, first, the sky is already "blue" due to diffuse sky radiation on a sunny day. Therefore, the cloud could be invisible if you want the cloud blue color.

Strictly speaking, if you really wanna see different clouds, you probably can see "green clouds" because of the polar lights in Canada or somewhere.

Answer 3

I've never seen a blue cloud - perhaps you mean why do thin mostly transparent wisps of cloud look blue but then the answer would be too obvious, I expect.

Answer 4

Clouds are Transparent , and sky is blue, that's why most kids coloure it with blue.

Answer 5

clouds are white not blue. the sky is blue

Answer 6

OHHHH I feel so smart...lol

It's the reflection of the water that makes the sky blue. The clouds aren't blue...they are white.