why the sky is blue?

Answer 1

because blue shows life and the sky show that the world is full of life look at the seas the water is blue and it's ful of life

Answer 2

Diffuse sky radiation is solar radiation reaching the earth's surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere. Also called skylight, diffuse skylight, or sky radiation. Of the total light removed from the direct solar beam by scattering in the atmosphere (approximately 25 percent of the incident radiation), about two-thirds ultimately reaches the earth as diffuse sky radiation.

Scattering is the process by which small particles suspended in a medium of a different index of refraction redirect a portion of the incident radiation in all directions. In elastic scattering, no energy transformation results, only a change in the spatial distribution of the radiation. The science of optics usually uses the term to refer to the deflection of photons that occurs when they are absorbed and re-emitted by atoms or molecules.

Answer 3

The blue that you see is sunlight that has been "scattered" by air molecules (mostly nitrogen) in our atmosphere. By scattered, I mean that the white light from the sun has been redirected after colliding with air molecules, and in the process different component colors of that white light have been sent in somewhat different directions. The degree of scatter depends on the wavelength of the component color of light, and because blue light is shorter wavelength it scatters more (that is, is sent in different directions from the initial direction more).

This is also called Rayleigh scattering. It helps explain not only why the sky is blue, but also why sunsets are more red. In order to reach our eyes, the sun's rays have to penetrate much more atmosphere at sunset (due to the low sun angle) than they do in midday, providing much more opportunity for those shorter wavelength colors (like blues and greens) to get scattered away. "Warmer" colors like yellows and reds don't get scattered, and are pretty much all that remains of the sunlight that reaches our eyes from the sky at sunset.

Answer 4

The white light from the sun is a mixture of all colours of the rainbow. This was demonstrated by Isaac Newton, who used a prism to separate the different colours and so form a spectrum. The colours of light are distinguished by their different wavelengths. The visible part of the spectrum ranges from red light with a wavelength of about 720 nm, to violet with a wavelength of about 380 nm, with orange, yellow, green, blue and indigo between. The three different types of colour receptors in the retina of the human eye respond most strongly to red, green and blue wavelengths, giving us our colour vision.