Why does the sky is blue?

  • Thread starter clarityx
  • Start date
  • #1
1
0
Please, answer the question, Why does the sky is blue?
 

Answers and Replies

  • #2
6,265
1,281
Because: the wind is high. It blows my mind.
 
  • #3
4,662
5
Look up Rayleigh scattering on the web: http://en.wikipedia.org/wiki/Rayleigh_scattering
I like the derivation and discussion in Slater and Frank "Electromagnetism" Chapter XII better than in Jackson "Classical Electrodynamics"
 
  • #4
FredGarvin
Science Advisor
5,066
9
Because if it were green, we wouldn't know where to stop mowing.
 
  • #5
Danger
Gold Member
9,607
249
Because if it were green, we wouldn't know where to stop mowing.

:rofl:
 
  • #6
mgb_phys
Science Advisor
Homework Helper
7,774
13
Why does the sky is blue?
Cos raindrops keep falling from it's head.....
 
  • #7
121
1
In short: the color we see is scattered light from the sun. However, the scattering process of air with light depends inversely with a fourth power on the wavelength, meaning that blue light (short wavelength) is way more likely to scatter than red light (long wavelength).

However, if a very long distance is travelled, longer wavelength photons will scatter as well, which you can see during a sunset. In case of a sunset, the sunlight "hoovers" over the surface of the earth for a long distance until it reaches your eyes; draw the earth as a circle and you will see why.
 
  • #8
Not sure what youre asking. Do you mean "Why is the sky Blue?" I dont think the sky does blue. either way its what lennox said. The scattering of light. Thats all it is.
 
  • #9
4,239
1
Because if it were green, we wouldn't know where to stop mowing.

When does the grass is stopped mowing?
 
  • #10
6,265
1,281
When does the grass is stopped mowing?
Think: why does the grass is mowed? The grass does is mowed to know when to stop.
 
  • #11
2,544
3
why is the sky blue ? Because god made it that way. is as good a reason as any .
the question should be how is the sky blue. basically what lennox said , it was explained to me this way its blue beacuse when the light hits the nitrogen molecules
it absorbs some of the light and blue is a higher energy wavelenght therefore blue light is scattered. sunsets are red becsue the angle of refraction is different and the light is traveling further through the air there fore red light is scattered.
 
  • #12
HallsofIvy
Science Advisor
Homework Helper
41,833
964
Not sure what youre asking. Do you mean "Why is the sky Blue?" I dont think the sky does blue. either way its what lennox said. The scattering of light. Thats all it is.

When does the grass is stopped mowing?

Think: why does the grass is mowed? The grass does is mowed to know when to stop.

Oh, stop! Many of the posters on this board had to learn English as a second language. How would you like to have to phrase question in Holoholo?
 

Related Threads on Why does the sky is blue?

  • Last Post
Replies
23
Views
4K
  • Last Post
Replies
15
Views
4K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
7
Views
3K
  • Last Post
3
Replies
64
Views
11K
  • Last Post
Replies
1
Views
677
  • Last Post
2
Replies
34
Views
5K
  • Last Post
Replies
12
Views
38K
  • Last Post
Replies
18
Views
3K
Replies
4
Views
10K
Top