Results 1 to 10 of 43

Thread: Faster than light

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1

    Faster than light

    this year is the most dangerous year, many discoveries, volcanoes, social rages, nuclear disasters, ... , so be carefull to the end of the year.
    1- a possible faster than light just recently:
    http://www.reuters.com/article/2011/...7KN25Q20110923

    http://www.scientificamerican.com/ar...ound-to-travel

    2- Breakthrough Could Enable Others (like your wife) to Watch Your Dreams and Memories [Video]
    http://blogs.scientificamerican.com/...emories-video/

  2. #2
    To put this in perspective, the neutrinos are being sent over a distance of 730Km and arrive 6e-8 seconds earlier than expected. This is the equivalent time it takes for light to travel 2 metres. This is a small discrepancy but I understand their instruments can resolve down to 20cm.

    Charles

    PS: Neutrinos are known for breaking the light-barrier in a dense medium (detected in water)

    http://en.wikipedia.org/wiki/Cherenkov_radiation
    Last edited by Charles Pegge; 23-09-2011 at 17:59.

  3. #3
    thinBasic MVPs danbaron's Avatar
    Join Date
    Jan 2010
    Location
    California
    Posts
    1,378
    Rep Power
    152
    I am pretty sure that neutrinos have mass.

    http://arstechnica.com/science/news/...ce-imaging.ars

    So, according to relativity theory, if and when one reached the speed of light, its mass should have become infinite.

    In that case, I think its gravitational field would have become infinitely strong.

    It seems to me that immediately, EVERYTHING should moved towards it with unimaginable acceleration.

    But, apparently, that didn't occur.

    So, what happened?

    http://www.latimes.com/news/science/la-sci-0923-speed-of-light-20110923,0,497738.story


    "You can't cheat an honest man. Never give a sucker an even break, or smarten up a chump." - W.C.Fields

  4. #4
    thinBasic MVPs danbaron's Avatar
    Join Date
    Jan 2010
    Location
    California
    Posts
    1,378
    Rep Power
    152
    I know nothing about this stuff.

    But, I think neutrinos constantly travel through the Earth unimpeded.

    In that case, it seems to me that if one was accelerated to faster than light speed, it should still be moving that fast, what would slow it down?

    Then, since neutrinos have mass, relativity theory says that the accelerated neutrino has infinite mass.

    Therefore, the particle would generate an infinite gravitational field, and every particle in the universe should be pulled towards it by an infinite force.

    But, we are still here, so, apparently that is not happening.

    (I think the weird thing is that other particles have been accelerated close to (probably at least 99% of) the speed of light, and they have gained mass according to Einstein's equation,

    m0 = mass at rest
    mk = increased mass
    vk = velocity
    ck = speed of light

    m = m0 / sqrt(1 - (v2 / c2)). [Eq. A]

    http://en.wikipedia.org/wiki/Mass%E2...gy_equivalence

    You can see, when v equals c, m becomes infinite (as long m0 is greater than 0).

    Last edited by danbaron; 25-09-2011 at 05:10.
    "You can't cheat an honest man. Never give a sucker an even break, or smarten up a chump." - W.C.Fields

  5. #5
    just imagine the web speed using radiation faster than light thrice or infinite. or a cellular phone using faster than light connection. now begins the real magic era.

  6. #6
    thinBasic MVPs danbaron's Avatar
    Join Date
    Jan 2010
    Location
    California
    Posts
    1,378
    Rep Power
    152
    Eq. A, above, is only supposed to apply for v <= c.

    But, what answer would it give if a neutrino was moving faster than c?

    Say, for instance, v/c = 5/4.

    Then, if you substitute into the formula, you get,

    m = 4m0 / 3i,

    where, i = sqrt(-1).

    What physical meaning would that have?

    "You can't cheat an honest man. Never give a sucker an even break, or smarten up a chump." - W.C.Fields

Similar Threads

  1. Going into the light
    By danbaron in forum Shout Box Area
    Replies: 1
    Last Post: 02-04-2011, 00:49
  2. Is it possible to draw this simple map faster?
    By Michael Hartlef in forum TBGL General
    Replies: 22
    Last Post: 02-12-2007, 09:59

Members who have read this thread: 0

There are no members to list at the moment.

Posting Permissions

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