Ornery.org
  Front Page   |   About Ornery.org   |   World Watch   |   Guest Essays   |   Contact Us

The Ornery American Forum Post New Topic  Post A Reply
my profile login | register | search | faq | forum home

  next oldest topic   next newest topic
» The Ornery American Forum » General Comments » Science Experiment - Light goes backwards and is faster than previous speed of light?

 - UBBFriend: Email this page to someone!    
Author Topic: Science Experiment - Light goes backwards and is faster than previous speed of light?
Kent
Member
Member # 832

 - posted      Profile for Kent   Email Kent   Send New Private Message       Edit/Delete Post   Reply With Quote 
Fox News

quote:
We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end. Through experiments we were able to see that the pulse inside the fiber was actually moving backward, linking the input and output pulses.
Freaky weird stuff. This is obviously how God is omnipresent.

[ May 19, 2006, 02:27 PM: Message edited by: Kent ]

Posts: 1434 | Registered: Nov 2002  |  IP: Logged | Report this post to a Moderator
Eric
Member
Member # 2699

 - posted      Profile for Eric   Email Eric       Edit/Delete Post   Reply With Quote 
I read this earlier today. I have to go have a drink now.
Posts: 448 | Registered: Dec 2005  |  IP: Logged | Report this post to a Moderator
Jordan
Member
Member # 2159

 - posted      Profile for Jordan   Email Jordan   Send New Private Message       Edit/Delete Post   Reply With Quote 
Does anybody have an aspirin? I think my brain just travelled backwards and cancelled itself out.
Posts: 2147 | Registered: Nov 2004  |  IP: Logged | Report this post to a Moderator
Clark
Member
Member # 2727

 - posted      Profile for Clark   Email Clark   Send New Private Message       Edit/Delete Post   Reply With Quote 
Key quotes from the article:

"The pulse of light is shaped like a hump with a peak and long leading and trailing edges. The leading edge carries with it all the information about the pulse and enters the fiber first. By the time the peak enters the fiber, the leading edge is already well ahead, exiting. From the information in that leading edge, the fiber essentially 'reconstructs' the pulse at the far end, sending one version out the fiber, and another backward toward the beginning of the fiber."

The information about the pulse is really all contained in the very leading edge of the pulse. That essentially "tells" the medium about the different frequencies of light in the pulse and the length of the pulse.

"Einstein said information can't travel faster than light, and in this case, as with all fast-light experiments, no information is truly moving faster than light."

Granted, it is very weird, but it turns out that the group velocity of a pulse of light can be greater than the speed of light. The phase velocity can be greater than the speed of light. The peak velocity can be greater than the speed of light. But, before anyone starts to think up any amazing inventions, as always, no information or energy can travel faster than the speed of light.

Posts: 420 | Registered: Jan 2006  |  IP: Logged | Report this post to a Moderator
The Drake
Member
Member # 2128

 - posted      Profile for The Drake   Email The Drake   Send New Private Message       Edit/Delete Post   Reply With Quote 
Can this explain the thoughts that come out of my mouth BEFORE I think them? [Smile]
Posts: 7707 | Registered: Oct 2004  |  IP: Logged | Report this post to a Moderator
cperry
Member
Member # 1938

 - posted      Profile for cperry   Email cperry   Send New Private Message       Edit/Delete Post   Reply With Quote 
LOL, The Drake! That MUST be it.
Posts: 2782 | Registered: Jul 2004  |  IP: Logged | Report this post to a Moderator
Richard Dey
Member
Member # 1727

 - posted      Profile for Richard Dey   Email Richard Dey   Send New Private Message       Edit/Delete Post   Reply With Quote 
Maybe brain waves are faster than light waves -- in a brainstorm.
Posts: 7866 | Registered: Apr 2004  |  IP: Logged | Report this post to a Moderator
ngthagg
Member
Member # 2737

 - posted      Profile for ngthagg         Edit/Delete Post   Reply With Quote 
I love physics, especially when I don't understand it.

ngthagg

Posts: 487 | Registered: Jan 2006  |  IP: Logged | Report this post to a Moderator
scifibum
Member
Member # 945

 - posted      Profile for scifibum   Email scifibum   Send New Private Message       Edit/Delete Post   Reply With Quote 
Me too...which means I love it pretty much all the time.
Posts: 6847 | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
Redskullvw
Member
Member # 188

 - posted      Profile for Redskullvw   Email Redskullvw   Send New Private Message       Edit/Delete Post   Reply With Quote 
pretty cool
Posts: 6333 | Registered: Nov 2000  |  IP: Logged | Report this post to a Moderator
canadian
Member
Member # 1809

 - posted      Profile for canadian   Email canadian       Edit/Delete Post   Reply With Quote 
waiting for vulture...
Posts: 5362 | Registered: Jun 2004  |  IP: Logged | Report this post to a Moderator
   

Quick Reply
Message:

HTML is not enabled.
UBB Code™ is enabled.
UBB Code™ Images not permitted.
Instant Graemlins
   


Post New Topic  Post A Reply Close Topic   Feature Topic   Move Topic   Delete Topic next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:


Contact Us | Ornery.org Front Page

Powered by Infopop Corporation
UBB.classic™ 6.7.1