Is the sky blue?

Answer 1

No -- it is composed of gases that are transparent. It only APPEARS blue due to the bending and scattering of the light.

"Tyndall Effect
The first steps towards correctly explaining the colour of the sky were taken by John Tyndall in 1859. He discovered that when light passes through a clear fluid holding small particles in suspension, the shorter blue wavelengths are scattered more strongly than the red. This can be demonstrated by shining a beam of white light through a tank of water with a little milk or soap mixed in. From the side, the beam can be seen by the blue light it scatters; but the light seen directly from the end is reddened after it has passed through the tank. The scattered light can also be shown to be polarised using a filter of polarised light, just as the sky appears a deeper blue through polaroid sun glasses.

This is most correctly called the Tyndall effect, but it is more commonly known to physicists as Rayleigh scattering--after Lord Rayleigh, who studied it in more detail a few years later. He showed that the amount of light scattered is inversely proportional to the fourth power of wavelength for sufficiently small particles. It follows that blue light is scattered more than red light by a factor of (700/400)4 ~= 10."

Answer 2

Actually, the sky was gray for most of the day, and it was blue for about 2 minutes before the sky became a dazzling rainbow of colors on the horizon, and then everything became black with dots.

Answer 3

Yes. You could argue that it's not blue, that it only appears blue because the other colours are absorbed by the atmosphere but if you're going to go that far, by the same reasoning you can argue that nothing has colour. Things only appear as certain colours due to light absorption.

If you can accept that roses are red, you can accept that the sky is blue.

Answer 4

Yes because every color except blue is absorbed into the atmosphere. That's why the sky is blue. It's reflected.

Answer 5

No. The sky is no color at all. It is made up of gas, with various particulate matter. The diffision, or bending of the light rays passing through the gas, is what makes the sky appear blue.
It's the same phenomenon that makes a rainbow appear -- bending light creates a prismatic effect.

Answer 6

earths sky was not blue until the introduction of oxygen producing lifeforms. so I'm going with the gas that mostly causes the blue color is oxygen. Not to mention water also appears blue from it's high oxygen levels.

Answer 7

The atmosphere is colorless.
The daytime sky is perceived as blue, and it is truly as blue as the frequencies of light that make up that color, which impinge uopn your retinas.

Answer 8

No. It is every color except blue. The color of an object that you see happens to be every color but the color observed.