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Thread: exsistance of light

  1. #1 exsistance of light 
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    hi,
    a few friends and i were discussing wether or not light, (as we see it on earth) exsists outside earths gravity feild. I have had this discussion with a few people, and some believe that the spectrums are not visibly tangible in the void of space.??


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    Forum Ph.D. GhostofMaxwell's Avatar
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    What do you mean: If you went to, say, Jupiter you would see no light?


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  4. #3  
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    light, maybe but not in the visible spectrums that we see on earth.
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  5. #4  
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    So you mean you would see nothing?
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  6. #5  
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    yes, we, humans would see nothing.
    the images we see of outer space are taken by cameras that detect all types of cosmic radiations and different spectrums, infra red, white, and heat sigs. this then is analysed data that is then put together and overlayed with our perceptions of colour. we do this with satalite imagery of the earth as well.
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    Forum Ph.D. GhostofMaxwell's Avatar
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    Probes have all frequency capabilities. A probe can be designed to take images all the way from radio - gamma.
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  8. #7  
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    none of which are visible
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  9. #8  
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    Quote Originally Posted by jezz
    none of which are visible
    ...but visible light which is, houm, visible... :wink:

    There's plenty of probes that have used visible light. I don't know where your friends got the idea visible light is no availabe. We even got a "family picture" of the whole solar system taken, in visible light, by the TV camera onboard one of the Voyager probes...

    Most photographs from Mars surface are taken in visble light. Most pictures from Jupiter and Saturn are too. There's a visible light camera onboard the Hubble. There's lots of amateur astrophotographs of distant objects taken with CCD cameras that reflect visible light only. Et cetera, et cetera...
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  10. #9  
    Forum Ph.D. GhostofMaxwell's Avatar
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    Quote Originally Posted by jezz
    none of which are visible
    How can the spectrum encompassing every wavelength not include visible?

    Yes! of course probes have imaged visible. More than likely they are in fact biased towards it. It being in the middle of the EM spectrum for one thing.

    As someone else has hinted at, you must be blind if you think we lack visible wavelength images of the solar system.
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  11. #10 Re: exsistance of light 
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    Quote Originally Posted by jezz
    hi,
    a few friends and i were discussing wether or not light, (as we see it on earth) exsists outside earths gravity feild. I have had this discussion with a few people, and some believe that the spectrums are not visibly tangible in the void of space.??
    Let me get this straight: The light emitted from distant objects disappears somewhere in space just to pop back into existance close to us and we can see it??? Or What?? I mean light is an electromagnetic field (as well as particles but let's not go there for the moment) and this exists no matter if you detect it or not. There are no quantum effects involved here i.e. the observer does not influence the observed system.
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  12. #11  
    Forum Junior SolomonGrundy's Avatar
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    i have seen the light hahahahaha
    Solomon Grundy
    In 1944, this creature rose from the swamp, with tremendous strength and some dormant memories that for example allowed him to speak English, but not knowing what he was, and not remembering Cyrus Gold or his fate. Wandering throughout the swamp, he encountered two escaped criminals, killed them, and took their clothes. When they asked him his name, he simply muttered that he had been born on Monday. Reminded of an old nursery rhyme about a man born on Monday, the thugs named the creature "Solomon Grundy".
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  13. #12  
    Moderator Moderator Janus's Avatar
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    Quote Originally Posted by jezz
    yes, we, humans would see nothing.
    the images we see of outer space are taken by cameras that detect all types of cosmic radiations and different spectrums, infra red, white, and heat sigs. this then is analysed data that is then put together and overlayed with our perceptions of colour. we do this with satalite imagery of the earth as well.
    While some of these images are taken with non-visible parts of the spectrum, Manyt of them are taken in just plain old visible light; the same visible light that our eyes detect.

    But I am curious. How can those that argue that light is not visible in space actually believe that this is even a remotely plausible position to take?
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  14. #13  
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    Quote Originally Posted by Janus
    Quote Originally Posted by jezz
    yes, we, humans would see nothing.
    the images we see of outer space are taken by cameras that detect all types of cosmic radiations and different spectrums, infra red, white, and heat sigs. this then is analysed data that is then put together and overlayed with our perceptions of colour. we do this with satalite imagery of the earth as well.
    While some of these images are taken with non-visible parts of the spectrum, Manyt of them are taken in just plain old visible light; the same visible light that our eyes detect.

    But I am curious. How can those that argue that light is not visible in space actually believe that this is even a remotely plausible position to take?
    Right! the light where is the light! Who eat the light ! Spit the light out now or else ! hahahahaha
    Solomon Grundy
    In 1944, this creature rose from the swamp, with tremendous strength and some dormant memories that for example allowed him to speak English, but not knowing what he was, and not remembering Cyrus Gold or his fate. Wandering throughout the swamp, he encountered two escaped criminals, killed them, and took their clothes. When they asked him his name, he simply muttered that he had been born on Monday. Reminded of an old nursery rhyme about a man born on Monday, the thugs named the creature "Solomon Grundy".
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  15. #14  
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    Well, unless you think the moon landing is a conspiracy......... those astronauts were able to see both Earth and the Moon while they were floating between them.
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