Why do we mow the grass?

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In summary, the sky is blue because the wind is high. The color we see is scattered light from the sun.
  • #1
clarityx
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Please, answer the question, Why does the sky is blue?
 
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  • #2
Because: the wind is high. It blows my mind.
 
  • #3
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
Because if it were green, we wouldn't know where to stop mowing.
 
  • #5
FredGarvin said:
Because if it were green, we wouldn't know where to stop mowing.

:rofl:
 
  • #6
clarityx said:
Why does the sky is blue?
Cos raindrops keep falling from it's head...
 
  • #7
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 don't think the sky does blue. either way its what lennox said. The scattering of light. Thats all it is.
 
  • #9
FredGarvin said:
Because if it were green, we wouldn't know where to stop mowing.

When does the grass is stopped mowing?
 
  • #10
Phrak said:
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
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
GetPhysical said:
Not sure what youre asking. Do you mean "Why is the sky Blue?" I don't think the sky does blue. either way its what lennox said. The scattering of light. Thats all it is.

Phrak said:
When does the grass is stopped mowing?

zoobyshoe said:
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?
 

1. Why is the sky blue?

The sky appears blue because of a phenomenon called Rayleigh scattering. This occurs when light from the sun enters Earth's atmosphere and interacts with gas molecules in the air. Blue light has a shorter wavelength and is scattered more easily, making it the most visible color in the sky.

2. Does the sky's color change throughout the day?

Yes, the color of the sky can change throughout the day due to the position of the sun. At sunrise and sunset, the sun's light has to travel through more of Earth's atmosphere, causing more scattering and making the sky appear more orange or red. The sky may also appear more blue or white during midday when the sun is directly overhead.

3. Why does the sky sometimes appear more vibrant or less blue?

The appearance of the sky can change depending on weather conditions and air pollution. On days with clear, dry air, the sky will appear a more vibrant shade of blue. However, on days with high levels of humidity or air pollution, the sky may appear less blue or even grayish.

4. Is the sky always blue on other planets?

No, the sky's color on other planets can vary depending on the composition of their atmosphere. For example, on Mars, the sky appears more reddish due to the presence of iron oxide particles in the atmosphere. On Neptune, the sky appears a deep blue due to the presence of methane gas.

5. Can the color of the sky change over time?

Yes, the color of the sky can change over time due to natural and man-made factors. Natural factors such as changes in Earth's atmosphere or volcanic eruptions can impact the scattering of light and affect the color of the sky. Human activities such as air pollution can also alter the color of the sky over time.

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