Why is the sky blue in colour?

Answer 1

Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.

Answer 2

because we have water vapour in the air.
These tiny droplets of water act like little tiny prisms.
Every see a rainbow after a storm, you see all the colours.
But the sky is one big rainbow, but we only see the blue light in mid day.

Blue light is bent the least through the water droplets, the other colours are bent more and away from you, giving the sky a predominant blue colour.

Go out side in the evening and watch the sun go down.
now the sun is no longer over head, but at an angle, now you will see the other colours come out.
This also happens in the morning, but in reverse

Remember blue is bent less while red is more easily bent.
watch the sky in the evening, it will change from blue, to green (not easily seen), orange, yellow then red.

a good experiment, get a prism, and a pin point white light from the sun, ( use a tiny mirror to reflect light into a darken room) beam this light into a prism, then measure the angles of each colour, coming out of the prism

Answer 3

The sky is blue because of Raleigh scattering. As light passes through the atmosphere it is scattered by molecules in the air. Blue has the shortest wavelength in the visible light spectrum so it is easiest and first to scatter. Hence why the sky is blue.

The reason we have pink and red sunsets and sunrises is because at those times of the day the sunlight has to travel farther in the atmosphere and therefore being scattered even more than usual.
Sometimes cities like L.A. who have a lot of smog and other stuff in their air will have gorgeous sunsets for the reason above but that is called Mie scattering.

Answer 4

Wow. Look guys, if you dont know the answer, dont answer the question!

If it's refection from the ocean, how do people in Wisconsin see a blue sky then? Red and pink sunsets result from dust in the air. Ask anyone around then and they'll tell you the sunsets in Nevada were glorious right after nuclear tests, because of the amount of dust in the air. Same thing after earthquakes, the sunrises and sunsets are breathtaking. Most people don't notice it, because theyre too busy digging out their loved ones.

The sky actually contains ALL colors of the spectrum. You see blue simply because there are more blue elements in the air reflecting the light to your eyes. All other colors are absorbed instead of being reflected.

Answer 5

Rinoos is more or less right. In the absence of resonance, short-wavelength light scatters more easily than long-wavelength light. In the absence of impurities, it scatters from density fluctuations in the atmosphere. This is known as Rayleigh scattering.

The sun appears red at sunset because the blue light has been scattered out of the rays directly from the sun to you.

Chemical composition can effect the apparent color of an atmosphere. Take Mars: the predominantly CO2 atmosphere scatters strongly in the red, because of the chemical peculiarities of CO2.

Answer 6

the sky is blue because the ocean reflects on the sun and makes the sky look blue!

Answer 7

Forget the scientific or the religious explanations. As I gazed up at the sky, I think such a child-like question reflects simplicity, innocence, and wonder. Ode to the days of childhood.

Answer 8

it appears blue because of the same reason of y sea is blue..
u know the spectrum of light? well, the red side of the spectrum has more wave length than the blue side.
so, the color with more wave length will be Less affected by the atmospheric impurities..and those with less wavelength like blue, violet ,indigo will be scatted more because of their short wave length.. as this scattering is caused by the particle every where in the atmosphere, we see sky as blue,

now, can u say, why sun is yellow?

Answer 9

It has something to do with the reflection ofthe seas, bodies of water. Some says the evaporation of these bodies of water causes the sky to be blue.

Answer 10

I think it has to do with a prism and the angle, or degree, or whatever it is called, of the color blue...and where the light (sun)hits it. That is why the color of the sky changes (reds,pinks, oranges) when the sun sets.