Question

Why do clouds seem white & sky blue

Answer 1

scattering by air molecules affects short-waveength light more than long-wavelength light, and so blue light tends to get scattered in random directions to create the diffusion

Answer 2

This is a very deep question if i continue it would take me about 15 minutes to write

Answer 3

the effect on the sky is called "dispersion" and is caused by the preferential scattering on the air molecules of the different colors composing the white light
blue and violet light are bent the most

like below:
http://screencast.com/t/AaeJ99K6b

Answer 4

@diva2000 if u r asking the physics behind it

Answer 5

so in the rainbow the red -orange-yellow-green
light from sun is not so much bent and does not reach our eyes
in the light from sun there is just little violet
therefore what we see from the light coming from Sun is blue

Answer 6

the clouds appear white because the small droplets of water, ice, or duct particles in them scatter the light in ALL directions

Answer 7

therefore all the colors come to our eyes and the sensation of "all colors" is white

Answer 8

Going into atomic physics frequency of white light is 430–790 THz


If you know the energy you can calculate the frequency by
E=hv
h = plack's constant = 6.626*10^-34

The frequency would lie between the range mentioned above which corresponds to white light

Answer 9

however, if most of the light is absorbed in those clouds, they appear dark or black

Answer 10

That's why clouds appear white

Answer 11

I mean one of the reasons

Answer 12

I suppose