Why is the sky seems so blue and sometime so gray?

Question

is it all because of pollution? what do you think?

Answer 1

the grayness of the sky is because of the clouds on a rainy and can be because of pollution. The sky is blue because our eyes are sensitive to red, green and blue light. Blue light which has the shortest wavelength out of the three hits the dust particles in the air and scatter causing the sky to be blue.

Answer 2

the sky is blue because of the way the sun's rays reflect through the atmosphere. The gray color is due to heavy rainclouds blocking out most of the sunlight.

Answer 3

It depends with the weather.When its calm the sky is blue but when its rainy it looks gray.The blue colour we see is actually the furthest our eyes can see!

Answer 4

I read somewhere that it has somethng to do with the light reflecting from the ocean and back into space as it leaves the earth it is bent by our atmosphere into this range of blue spectrum or somethng like that.

Answer 5

Those smoke and dust particles released from factories will collide with the sun rays and force all the seven colours of sunlight to have same amount of scattering.So it is gray in colour.Its having that colour mainly in urban areas.Those dust particles will have size less or almost same as that wavelength of solar light.