Why exactly is the sky blue anyway? I've been asking this question for years and still haven't found an answer. It's a simple question everyone asks. I searched for it in Google and found NASA's explanation. I still don't get it. Can someone help me out?
Why exactly is the sky blue anyway? I've been asking this question for years and still haven't found an answer...
Brody Torres
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Nathan Brown
its reflection off the blue ocean
Josiah Robinson
Why is the ocean blue if water is clear
Christopher Morgan
Why is the ocean blue?
Oliver Cox
The atmosphere scatters some wavelengths more strongly than others. Has to do with the spacing of the molecules of the air.
Blue is very strongly scattered and appears to come from every which way.
Red is scattered very little. A sunset looks red because the red comes directly to your eyes whereas the blue has been stripped out.
This is also why the Moon looks red when it's eclipsed by the Earth. The Earth is blocking off direct light from the Sun and the only illumination striking the Moon is light which just missed the Earth and was diffracted through our atmosphere.
Does that help?
Nicholas Lopez
Because water is only relatively clear. A thickness of it absorbs red strongly, blue less strongly.
Caleb Diaz
ocean water is blue, tap water is clear, it has to do with the saltiness and refraction
Jacob Brooks
it's the spirit of God, that's why no other planet has an atmosphere like Earth's
Jackson Nguyen
Actually the fact this is on nasa is reason enough to believe nasa is fraudelent. The sky is blue cause ozone is blue, and is backed up by blue ice in the antarctic.
Jesus fuck
>"the sky is blue cause blue light has a shorter wavelength" - nasa
Ayden Myers
1) The visible spectrum of light goes from longest wavelength to shortest length, from red to violet.
2) The shorter the wavelength, the more a given range of color will be scattered by the atmosphere.
3) You'd think this would mean the sky should be violet, but:
4) Light emission from the sun isn't constant at all wavelengths.
5) Violet is partially absorbed by the atmosphere.
6) Human eyes are less sensitive to violet than to blue.
So blue is the shortest wavelength range of the color spectrum represented in significant amounts by light emission from the sun and what lesser amounts of violet are there in the initial light emission get filtered out through a combination of atmosphere absorption and our eyes perceptually shifting wavelengths of visible light towards the tennis ball green color i.e. away from violet and towards blue in this case.
John Sanders
ozonesolutions.com
>"The sky is blue because of ozone."
>Okay, this one is not related to our business, but we have heard it mentioned before so we will address it. While ozone is a blue gas, the sky is blue for a very different reason.
>The blue color of the sky is due to Rayleigh scattering. Blue light has a shorter wavelength than the other "rainbow colors". This blue 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.
Isaiah Evans
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Jayden Kelly
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Jaxson Ross
Source on the tennis ball green part:
hypertextbook.com
>Faughn, Jerry S. & Raymond A. Serway. College Physics, 6th ed. Canada: Thomson, Brooks/Cole, 2003: 675.
>"The eye's sensitivity is a function of wavelength and is greatest at a wavelength of about 5.6 × 10−7 m (yellow-green)."
>560 nm
>Bradley, Arthur, Larry Thibos, & Xiaoxiao Zheng. Achromatizing the Human Eye. Indiana University, 1989.
>"Most of the light in a broad spectrum white is concentrated around the peak of the photopic luminosity function (555nm), and if a wavelength near 555nm is in focus, most of the light will be less than 0.25 diopters out of focus."
>555 nm
>Hattori, Tadashi, Takasi Taguchi, & Yashiki Ueno. Antiglare Mirror for an Automobile. US Patent, 29 Sept. 1987.
>"In this spectral reflection, the maximum reflection exists in a blue zone, which means that the mirror gives off blue reflected light when no voltage is applied to the electrodes 2 and 7, and the visual reflectivity is approximately 44% since the maximum human visual sensitivity is approximately 550 nm."
>550 nm
>McGrath, Kimberley A. World of Biology. USA: The Gale Group, 1999: 707.
>"Wavelengths of approximately 565 nm (yellow light) are perceived by both green and red cones, therefore yellow appears as a very bright color."
>565 nm
lsrtools.1apps.com
>RGB Hex: #B6FF00
Adam Gray
Glacial ice isn't blue for the same reason the sky is blue.
dartmouth.edu
>Over the years, we have often asked scientific colleagues why it is that water is blue. Common responses have included light scattering -- after all the sky is blue
>However, the work described below demonstrates that water has an intrinsic color, and that this color has a unique origin. This intrinsic color is easy to see, and has been seen by the authors in the Caribbean and Mediterranean Seas and in Colorado mountain lakes. Because the absorption which gives water its color is in the red end of the visible spectrum, one sees blue, the complementary color of red, when observing light that has passed through several meters of water. This color of water can also be seen in snow and ice as an intense blue color scattered back from deep holes in fresh snow. Blue to bluegreen hues are also scattered back when light deeply penetrates frozen waterfalls and glaciers.
Tyler Hill
Here are a few "explanations" for why the sky is blue.
1. Wavelengths did it.
2. Scattering light did it.
3. Ozone did it.
4. Polar ice did it.
5. God did it.
Kevin James
Why can't we see the blue sky from outer space? You can see the sky from underneath it but you can't see the sky from above, it suddenly disappears. Sounds kind of fishy. Also why are the oceans blue? It's like NASA made a fake image in the 1960s, realized they fucked up, but decided to stick with it anyway.
Elijah Martinez
Air is blue. This is also why distant mountains seem to have a bluish tinge to them.
Eli Harris
Because the sky gets shy when photographed from an unflattering angle.
Chase James
>the sky is blue cause the sky is blue
Nicholas Garcia
Because the gasses in our atmosphere are blue in color
Its why things like mountains and shit have a blue tinge over them when they're fucking far away, or why the moon looks blue during the day
Getting real fucking sick of people over-complicating the answer, getting into color wavelength and light refraction shit
You may as well ask why anything is any color, if you're going there
Lucas Collins
>It's blue because it's blue
Chase Rodriguez
What gasses? Nitrogen? Is nitrogen blue?
Christopher Gutierrez
>Why exactly is the sky blue anyway?
en.wikipedia.org
Easton Baker
>things are configured to be the way they are, if things were any other way, things would be different
David Lopez
Nitrogen is mostly responsible, Oxygen is also blue though, much more visibly so when its in liquid form
Jacob Johnson
I'm reading this thread and I'm seeing 10 different answers to you question.
The biblical explanation for why the sky is blue is because there's water above it, in addition to being below it.
Genesis 1:7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
8 And God called the firmament Heaven. And the evening and the morning were the second day.
Robert Torres
That's liquid nitrogen. Is gaseous nitrogen blue?