Why the sky is blue?

Answer 1

The sky appears blue (instead of black) because light passing through the air hits tiny particles like dust and pollen. These tiny particles are large enough to reflect blue light, but red light (which has a longer wavelength) is not reflected nearly as much. So the result is that the blue light gets scattered by the particles, and you see it when you look up.

The other side of this is sunset, when the sun appears reddish-orange low on the horizon. That's because the light rays have to pass through a lot of air (and particles) before they get to your eyes, and all the blue light was scattered away and dispersed. That leaves only the red end of the spectrum to penetrate the atmosphere and reach your eyes.

At noon, the sun is coming straight down and only passing through ten miles of atmosphere or so. At sunset, the same light has to pass through many hundreds of miles of air to reach you. You will see more dramatic sunsets (redder and darker) when there's a lot of dust, smoke or pollen in the air. When volcanic eruptions occur, intense sunset colors are seen around the world, sometimes for a couple of years after the event.

If the air is truly pure, it doesn't scatter light much at all. If you climb up above the atmosphere, or nearly to the top of it in an airplane, the sky appears black, not blue. If we had particle-free air, the sky would likewise appear black instead of blue. But we don't.

Answer 2

OK, its not reflected off of particles in the sky.

The blue light is absorbed and re-emitted by gasses in the atmosphere. The reason they grab the blue light is because the energy contained in the blue photons corrosponds to a quantum level jump in the electron energy levels of the gas.

So, light passing above us is absorbed and then re-emitted in a random direction when the electron drops back down an energy level. Some of the photons make it to us.

Now, most of the other things that were said about sunsets being red/orange because the blue has been 'filtered' out and the sky would be black if it weren't for the scattered blue light are valid.

Oh, jeez, the web site 'why is the sky blue' isn't about physics. Its a commercial gambling site and they admit that they don't know why the sky is blue. They just liked the name.

So, please, listen to the physic teacher and ignore all the comments about scattering off of dust and pollen and water

Answer 3

The sky is blue because of dust particles suspended in the atmosphere. White light hits the atmosphere, and we know white light can be split into different wave lengths which correspond to differnet colors. This is what happens when we see a rainbow.

It turns out that light with the wavelength of blue, passes through the dust in the atmosphere easiest, hence we see a blue sky. In the morning or the evening, just after sunrise or before sunset, the light has to pass through more atmosphere than at any other time. In these conditions red light passes through the atmosphere easiest, hence the red sunrise and sunsets. Hope this answers your question.

Answer 4

Since water covers most of the earth, the blue sky is a reflection of the blue water.

Answer 5

SKY IS BLUE BECAUSE BLUE LIGHT HAS LOO FREQENCY SO THAT IT SCCATERS IN THE SKY AND CAN'T REACH TO EARTH SO

Answer 6

color is like a rainbow you see after a rain shower. light is a spectrum of color and has a wavelenght for each color. as light from the sun reaches the atmoshere, red, yellow, green,and so forth due to it's wavelenght gets filtered out leaving blue

Answer 7

why r u a human being????????
of course it is natural ..god has made it no one can change it........

Answer 8

because it can be