Notices
Results 1 to 2 of 2

Thread: Faster Than Light?

  1. #1 Faster Than Light? 
    Forum Sophomore
    Join Date
    Dec 2010
    Posts
    117
    The latest experiments beaming neutrinos from Cern in Geneva to Grand Sasso has produced the same result again
    even having adjusted the length of the neutrino chains used. So what does that tells us?

    I for one am still a bit sceptical, the distance between the send and recieving points is quoted as 732 Km ie the distance of the SECANT drawn between
    the 2 points [ not as the crow flies ] One wonders how accurate the distance measurement can be ? Given that Italy has some vey active volcanic areas
    - therefore subject to a lot of movement, I would say that a measurement of the tolerance required would be very difficult to make.

    SOME MATHS

    Given that light travels 11.3 inches in a nano second - the 6 billionths of a second discrepancy represents a distance 67.8 inches.
    732 Km = 454.8 miles = 28,816,128 inches 67.8 is 1 /425,016 th of 28.8 million

    My speculation is that although the timings may well be superbly accurate, the speed calculation depends on an equally accurate distance measurement
    with a miniscule margin of error that may not be acheivable. This experiment needs to be repeated to as many different points on the Earth as possible.


    Reply With Quote  
     

  2.  
     

  3. #2  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    17,036
    Quote Originally Posted by tszy View Post
    One wonders how accurate the distance measurement can be ? Given that Italy has some vey active volcanic areas
    - therefore subject to a lot of movement, I would say that a measurement of the tolerance required would be very difficult to make.
    I am less concerned about the distance than the timing. The distance was measured with an error of 20cm (0.67ns). There is a very nice graph in the paper (page 10) showing the slow change due to continental drift (< 1cm/year) and the big jump (~7cm caused by the L'Aquila earthqauke).

    This experiment needs to be repeated to as many different points on the Earth as possible.
    I don't think anyone will argue with that! The race is on...


    Reply With Quote  
     

Similar Threads

  1. Is it possible to go faster that the speed of light?
    By lanceschroederl@yahoo.com in forum Physics
    Replies: 31
    Last Post: February 27th, 2011, 04:38 AM
  2. Faster than the speed of light?
    By treats in forum Physics
    Replies: 26
    Last Post: December 23rd, 2010, 06:53 PM
  3. Faster than the speed of light
    By tenniskettle in forum Physics
    Replies: 30
    Last Post: October 18th, 2010, 04:27 PM
  4. Faster than Light
    By MrCat in forum General Discussion
    Replies: 5
    Last Post: June 13th, 2010, 01:31 PM
  5. Faster than Light data possible??
    By daveyjones in forum Physics
    Replies: 3
    Last Post: November 10th, 2005, 01:20 AM
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
  •