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Is the sky really blue?

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Wendy

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Is the sky really blue?
« on: June 03, 2011, 03:51:21 AM »
It always seemed more cyan than blue to me. On another note, today is a good day. Not a cloud in the sky, not a care in the world.
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Quote from: Wendy on December 31, 1969, 04:00:00 PM
Here's an explanation for ya. Lurk moar. Every single point you brought up has been posted, reposted, debated and debunked. There is a search function on this forum, and it is very easy to use.
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Hessy

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Re: Is the sky really blue?
« Reply #1 on: June 03, 2011, 05:30:29 AM »
Quote from: Wendy on June 03, 2011, 03:51:21 AM
It always seemed more cyan than blue to me. On another note, today is a good day. Not a cloud in the sky, not a care in the world.

If you're the biggest concern you have is which shade of blue the sky is, you're clearly having a great day  ;)
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markjo

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Re: Is the sky really blue?
« Reply #2 on: June 03, 2011, 06:47:24 AM »
There are many shades of blue, including...



(wait for it)



(wait a little longer)



(keep waiting)



...sky blue.

(was it worth the wait?)
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Wendy

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Re: Is the sky really blue?
« Reply #3 on: June 03, 2011, 08:16:59 AM »
(Yes, indeed! I still think it's more of a cyan tint than blue, though.)
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Quote from: Wendy on December 31, 1969, 04:00:00 PM
Here's an explanation for ya. Lurk moar. Every single point you brought up has been posted, reposted, debated and debunked. There is a search function on this forum, and it is very easy to use.
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sillyrob

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Re: Is the sky really blue?
« Reply #4 on: June 03, 2011, 08:21:42 AM »
There's clouds here, but since it's supposed to be mid 70's all week, and back home is supposed to hit 103, I'm totally fine.
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hoppy

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Re: Is the sky really blue?
« Reply #5 on: June 03, 2011, 06:42:12 PM »
Quote from: Wendy on June 03, 2011, 03:51:21 AM
It always seemed more cyan than blue to me. On another note, today is a good day. Not a cloud in the sky, not a care in the world.
  The cyan tint is due to pollution and pollen.
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Wendy

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Re: Is the sky really blue?
« Reply #6 on: June 04, 2011, 05:09:36 AM »
It could simply be because the blueshift is incomplete, though. There's not a lot of pollution in the country-side and even less pollen in late summer.
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Quote from: Wendy on December 31, 1969, 04:00:00 PM
Here's an explanation for ya. Lurk moar. Every single point you brought up has been posted, reposted, debated and debunked. There is a search function on this forum, and it is very easy to use.
?

Nomad

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Re: Is the sky really blue?
« Reply #7 on: June 04, 2011, 11:53:56 AM »
The sky isn't blue, it's just the result of refraction of sunlight through the atmosphere.  It appears blue.  Or cyan. Or whatever.
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Quote from: PizzaPlanet on March 24, 2011, 11:05:27 AM
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Particle Person

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Re: Is the sky really blue?
« Reply #8 on: June 05, 2011, 01:16:36 PM »
Quote from: Nomad on June 04, 2011, 11:53:56 AM
The sky isn't blue, it's just the result of refraction of sunlight through the atmosphere.  It appears blue.  Or cyan. Or whatever.

Is there a difference between being blue and appearing to be blue?
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Wendy

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Re: Is the sky really blue?
« Reply #9 on: June 05, 2011, 01:20:36 PM »
That depends. I hear there are paints which can be treated to appear as being another colour than what they actually are, if that makes sense. For example, you can paint a car white with said paint and then treat it to make it black. It's called paramagnetic paint, apparently.
« Last Edit: June 05, 2011, 01:22:26 PM by Wendy »
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Quote from: Wendy on December 31, 1969, 04:00:00 PM
Here's an explanation for ya. Lurk moar. Every single point you brought up has been posted, reposted, debated and debunked. There is a search function on this forum, and it is very easy to use.
?

Nomad

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Re: Is the sky really blue?
« Reply #10 on: June 05, 2011, 04:02:47 PM »
Quote from: Particle Person on June 05, 2011, 01:16:36 PM
Quote from: Nomad on June 04, 2011, 11:53:56 AM
The sky isn't blue, it's just the result of refraction of sunlight through the atmosphere.  It appears blue.  Or cyan. Or whatever.

Is there a difference between being blue and appearing to be blue?

There is no property to the sky that makes it blue.  It has no pigment.  It does not reflect or emit light in any certain wavelength.  It's the light propogating through it that appears in a blueish wavelength.
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Quote from: PizzaPlanet on March 24, 2011, 11:05:27 AM
Nomad is a superhero.

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iznih

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Re: Is the sky really blue?
« Reply #11 on: June 05, 2011, 04:30:41 PM »
Quote from: Nomad on June 04, 2011, 11:53:56 AM
The sky isn't blue, it's just the result of refraction of sunlight through the atmosphere.
it's scattering, not refraction ;) (refraction plays a role, though). sorry to be nit picking
« Last Edit: June 05, 2011, 04:37:29 PM by iznih »
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Nomad

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Re: Is the sky really blue?
« Reply #12 on: June 05, 2011, 05:31:55 PM »
No, no.  Don't apologize for being pedantic.  No one else here does.
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Quote from: PizzaPlanet on March 24, 2011, 11:05:27 AM
Nomad is a superhero.

8/30 NEVAR FORGET
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PizzaPlanet

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Re: Is the sky really blue?
« Reply #13 on: June 05, 2011, 06:47:09 PM »
ITT: Everyone ignores how Doppler effect affects the sky's colour.
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Nomad

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Re: Is the sky really blue?
« Reply #14 on: June 05, 2011, 10:51:39 PM »
Regardless, the sky isn't blue.
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Quote from: PizzaPlanet on March 24, 2011, 11:05:27 AM
Nomad is a superhero.

8/30 NEVAR FORGET
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Parsifal

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Re: Is the sky really blue?
« Reply #15 on: June 05, 2011, 10:53:56 PM »
Quote from: Nomad on June 05, 2011, 05:31:55 PM
No, no.  Don't apologize for being pedantic.  No one else here does.

I'm just sorry he beat me to it.
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