For science!
#21
Posted 26 November 2009 - 09:17 AM
Break dancing into the hearts of millions
#22
Posted 26 November 2009 - 10:58 AM
The light of a star (or a light bulb, for that matter) shines in all directions. There are not laser beams aimed directly at earth. The further you get away from the light source, the weaker the light becomes. The whole sky might indeed be filled with starlight, but the majority of it is so weak that our eyes and optical instruments don't see it / tone it down in order to not be overloaded from the nearer stars' much brighter light.why isn't the night sky just white with stars? i mean, there are suppose to be so many of them why do they not fill up the whole sky?
The time it takes the light to arrive does not affect it's brightness. It's the same as with internet. Even with an incredibly high ping, your bandwidth can still be high as well.It takes years for a star far far off to transfer light from the sun to our planet - thus, ones that take quite a long time to reach Earth show up less often, or aren't very visible.
Einstein: "We can’t solve problems by using the same kind of thinking we used when we created them."
#23
Posted 26 November 2009 - 03:42 PM
#24
Posted 26 November 2009 - 04:21 PM
Also, when the distance from the source of the light and the spectator gets bigger, the light doesn't get weaker. Instead, all the light waves emitted from the source scatter around, covering larger and larger area. Thus, the amount of light beams that hit a single spot decreases, and that spot gets less illuminated.
Edited by Grimson, 26 November 2009 - 04:31 PM.
#25
Posted 26 November 2009 - 04:45 PM
Firstly, Romanul, I am 20 years old and in the middle of an English degree. This is simply curiosity, as could perhaps have been guessed by my opening statement: "I am no good at science." Secondly, your reply did not answer anything. You merely stated two facts without any kind of explanation. The explanation is what I'm really after here. Thank you Grimson for actually answering the question. And thank you Olli for continuing to be quite so misanthropic in such an entertaining fashion.
Next question, anyone?
Lol?I was just joking.And,no,FYI,I did not use the wiki.
#26
Posted 27 November 2009 - 04:03 AM
Scientists believe universal expansion is part to blame. As the universe expands further the light beams get stretched. As you may or may not know, the frequency of the light beam distinguishes what colour it shows as
(Heres a picture to help explain)
Anyway, with the universe expanding the frequency of the light gets lower, till it travels below the visible colour spectrum into infrared and the like.
Another factor is the time it takes light to travel. When looking up at the stars you are looking back in time, as it has taken a while for the light from those stars to reach us. Looking backwards in time means that the sky isn't white with light because you are looking so far back that there are no stars there yet.
The light from the stars that are now there still hasn't reached us, so we are looking back to a point where there was no stars there. Perhaps the universe hadn't even expanded out that far and you are looking at the nothingness that predates the universe.
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I think that's all pretty cool
#27
Posted 27 November 2009 - 05:54 AM
SCIENCE!
Yes! That's me, all the way.Pasidon, I have found that you can get away with just about everything if you claim it is 'for science'. Shout it at the top of your lungs and nobody will stop you, as exemplified herein:
#28
Posted 27 November 2009 - 11:41 AM
Yeah, I meant to say that the light is spread thinner, so less rays hit the same area. The rays themselves indeed don't get weaker (unless they pass through materials)Also, when the distance from the source of the light and the spectator gets bigger, the light doesn't get weaker. Instead, all the light waves emitted from the source scatter around, covering larger and larger area. Thus, the amount of light beams that hit a single spot decreases, and that spot gets less illuminated.
Einstein: "We can’t solve problems by using the same kind of thinking we used when we created them."
#29
Posted 27 November 2009 - 04:45 PM
Oh and all that science jazz, I suppose.
#32
Posted 29 November 2009 - 12:15 PM
#33
Posted 29 November 2009 - 12:19 PM
Then again, you can see the northern lights in Scotland...
#34
Posted 29 November 2009 - 12:20 PM
#35
Posted 29 November 2009 - 12:43 PM
#37
Posted 29 November 2009 - 09:05 PM
#38
Posted 29 November 2009 - 09:29 PM
#39
Posted 29 November 2009 - 10:10 PM
Everyone else should be fine.
#40
Posted 29 November 2009 - 10:16 PM
Only if our eyes would be a load more sensitive though.This is something like what the sky would look like on a cloudless night if there was no street lighting.
Einstein: "We can’t solve problems by using the same kind of thinking we used when we created them."
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