why is the sky blue?

Question

I know it has something to do with the sea, but what i dont know?

Answer 1

The sky is blue because of scattering of light.

Light as u mite know comprises 7 colours
Violet
Indigo
Blue
Green
Yellow
Red

Now our atmosphere has many many billions of tiny dust particles invisible to human eye

When Light falls on these particles it is split it is scattered into these colours of these Voilet Indigo and Blue are the wavelengths which get less scattered and these are in the visible range ....the Green Yellow and Red part are so scattered that they go beyond the visibility range of wavelengths.
so as a result of this scattering we see Bluish hue in the sky

Answer 2

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

Answer 3

Blue light has a shorter wavelength than normal light. Our eyes perceive the sky as blue due to the fact that blue is the shortest of all wavelengths, although it is not actually this colour. The sea is a reflection of the sky.

Answer 4

Two things...oxygen and prismatic diffraction of sunlight. During most of the day, the curvature of the Earth's atmosphere diffracts sunlight so that we see it as blue. If you notice around sunrise and sunset the sky becomes red and orange and purple and dark blue, etc. This is because the angle of diffraction changes as the position of the Earth relative to the sun changes. The abundance of oxygen in our atmosphere has a slight effect but without the diffraction, we would probably wouldn't even be able to detect it with our eyesight. Seriously though, this question has been asked at least a million times. I just wanted to answer it because I never had before. Continue to be curious about the world around you.

Answer 5

I thought the sea was blue BECAUSE of the sky rather than the other way round. Look at the sea on a nice sunny day and compare it to an overcast day and see how the sea is a different colour.

Answer 6

No, nothing to do with the sea (Other way round!) It is caused by fluctuation scattering. When we look up at the sky, the red cones in our retina respond to the small amount of scattered red light, but also less strongly to orange and yellow wavelengths. The green cones respond to yellow and the more strongly-scattered green and green-blue wavelengths. The blue cones are stimulated by colours near blue wavelengths which are very strongly scattered. So we see blue!

Answer 7

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

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.

see here
http://www.math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html
and here
http://www.sciencemadesimple.com/sky_blue.html

Answer 8

No the sea looks blue because it refelects the sky.
The sky looks blue because the atmosphere reflects light in the blue band and lets light through in the other color bands.

Answer 9

Look up atmospheric perspective. When light particles pass through air molecules it's blue.

Answer 10

aggh! It has nothing to do with the sea - this question has been asked thousands of times. Search for the question and you will get plenty of results.

Since nobody else has mentioned it - please look up 'Rayleigh scattering'.