Notices
Results 1 to 7 of 7

Thread: Speed of light going up and down?

  1. #1 Speed of light going up and down? 
    Forum Professor Obviously's Avatar
    Join Date
    Aug 2007
    Location
    Norway
    Posts
    1,415
    I don't have much knowledge in the subject, so I would like to see what you guys think of this

    http://www.science.unsw.edu.au/news/...ightspeed.html

    Dr JoĆ£o Magueijo, who will deliver a free public lecture on Thursday evening at UNSW, caused a scientific furore in 1999 when he published a paper claiming that light may have travelled much faster at the Big Bang than it does now. Now Reader in Theoretical Physics at Imperial College in London, Dr Magueijo's first attempts to publish his ideas in the scientific press was met with derision.

    So was Einstein wrong? "No, it just means that the theory of relativity isn't the last word on the laws that govern the universe," says the 38 year-old Magueijo. "Instead of there being fixed laws, it's possible that the laws themselves are variable, like light itself."
    http://www.worldnetdaily.com/news/ar...TICLE_ID=39733

    What he found defied belief: The derived light speeds from the early measurements were significantly faster than today. Even more intriguing, the older the observation, the faster the speed of light. A sampling of these values is listed below:


    In 1738: 303,320 +/- 310 km/second
    In 1861: 300,050 +/- 60 km/second
    In 1877: 299,921 +/- 13 km/second
    In 2004: 299,792 km/second (accepted constant)
    I did some more searching and came over this:

    http://www.skepticfriends.org/forum/...q=4&fldAuto=52

    It’s true that scientists reported inconsistent rates throughout history, but between 1927 and 1960, the fastest and slowest rates were off by only one part in ten thousand. The figures showed a slight decrease in speed between 1927 to 1935, remained roughly constant between 1935 to 1950, and then slightly increased between 1950 and 1960.

    Does that mean the speed of light alternately sped up and slowed down over three decades? Or, as is more likely, did the experimental processes improve over time?
    Is the speed of light constant or is it going up and down? (I'm a bit confused now you see ^^)


    Reply With Quote  
     

  2.  
     

  3. #2  
    Moderator Moderator
    Join Date
    Jun 2005
    Posts
    1,623
    I'm pretty sure it's not relevant to the Special Theory. All that requires is that light-speed is measured to be the same, i.e. constant, by all "observers" whatever their rate of relative motion. Actual numbers representing light-speed don't come into that theory


    Reply With Quote  
     

  4. #3  
    Forum Bachelors Degree The P-manator's Avatar
    Join Date
    Nov 2005
    Location
    Toronto
    Posts
    474
    What I'm wondering about is how they calculated the speed of light in 1738.
    Pierre

    Fight for our environment and our habitat at www.wearesmartpeople.com.
    Reply With Quote  
     

  5. #4  
    Forum Freshman
    Join Date
    Sep 2007
    Posts
    20
    I wouldn't be surprised if it were true.

    The light speed has little to do with light itself, but more with some basic properties of time-space. Light just simply takes takes it to the limit.
    Reply With Quote  
     

  6. #5  
    Forum Freshman Tony John C's Avatar
    Join Date
    Oct 2007
    Location
    Pennsylvania
    Posts
    94
    This is absolutely fascinating. Light being a variable, I never even considered it. Though we cannot comprehend the universe or infinite, so there may be a chance. It would be worth it to investigate further.
    Why is hate so ingrained in humans? For the supposed enlightened species we are very limited to such primitive behaviors. Peace is a fleeting in our society.
    Reply With Quote  
     

  7. #6  
    Forum Junior Twaaannnggg's Avatar
    Join Date
    May 2007
    Posts
    248
    Well, back at the university (for me thats a thing of the past siiiince...ummmm.....a long time ago) in physics lab we also had to do the "measure c" thingy and it's a MAJOR pain in the ass to do that. And the sources for error are abundant. We ended up with something like 3.1ahemmm*10^8m/s about 5% off the real value. I'd say we did not re-write science history, we just did a shitty job. And this measurement was done with equipment from the 20th century, not with gear from 17umpteen.

    So much for the thesis: older measurements = larger c

    Does not work that way.
    Build a man a fire and he will be warm for a day, set a man on fire and he will be warm for the rest of his life.
    Reply With Quote  
     

  8. #7  
    Suspended
    Join Date
    Sep 2007
    Location
    Avalon, England
    Posts
    18
    If light did speed up or slow down in the late 30's to 50's then calcuations using the Lorentz factor and observations should be off in accordance to the early 20th Century. Someone would have noticed something. I doubt that light went slower or faster but it's still a posibility never the less.
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •