Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > General Discussions > Off-Topic Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-04-2006, 11:35 PM
Botnst's Avatar
What knockers!
 
Join Date: Jun 2003
Location: There castle.
Posts: 40,773
Atto-boys: BBC

Shortest time interval measured

New developments are producing to ever more accurate time technologies
Scientists claim they have measured the shortest interval of time ever.
Researchers used short pulses of laser light to produce images of electrons leaving atoms and recorded what happened to within 100 attoseconds.

To imagine how long this is, if 100 attoseconds is stretched so that it lasts one second, one second would last 300 million years on the same scale.

Scientists used the technique to record the dynamics of electrons in atoms and report their findings in Nature.

The research team employed extreme ultraviolet (XUV) light pulses to excite atoms, prompting them to emit electrons, the small negatively charged particles that are a fundamental part of every atom.

"We accelerate the electrons spinning around the nucleus. Some pick up so much energy that they leave the atoms forever," Professor Ferenc Krausz, of the Technische Universitat Wien, in Austria, told BBC News Online.

Future clocks

At the same time, the scientists used a device called a Few-Cycle Laser to capture "tomographic images" of these electrons that gave information about how they behaved with time.

This allowed the scientists to distinguish events within 100 attoseconds, the shortest interval of time ever recorded.


THE ATTOSECOND
An attosecond is one quintillionth (10 to the power of minus 18) of a second
Caesium atomic clocks are accurate to one second over many millions of years. The development of laser counters will push clocks to theoretical billion-year accuracy. The clocks' technology will be used in telecommunications and experiments testing fundamental theories in physics. They will also be used to time important processes in biologocal cells, to aid our understanding of disease. The advance opens up the possibility of more accurate timekeeping.

Existing atomic clocks are very accurate and measure time by counting the number of times caesium atoms jump back and forth between different energy levels.

__________________
'Government is like a baby:
An alimentary canal with a big appetite at one end and
no sense of responsibility at the other'
- Ronald Reagan
Reply With Quote
  #2  
Old 03-05-2006, 12:44 AM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 19,567
An angstrom is 10 to the minus 10 meters. One ten billionth of a meter. My high school physics teacher used to say a "Jiffy" was the length of time it took light to travel one angstrom.
__________________
cmac

1986 300SDL, 351K
1984 300D, 133K
Reply With Quote
  #3  
Old 03-05-2006, 12:58 AM
Austin85's Avatar
Smells like Diesel..
 
Join Date: Jun 2005
Location: Boca Raton, Fl
Posts: 2,723
Talking Wronnng

The shortest time measured is the time between when a NYC traffic light turns green, and when the car behind you blows his horn.

Johnny Carson joke 20 yrs ago....
__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

Reply With Quote
  #4  
Old 03-05-2006, 01:00 AM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 19,567
Just to blow some dust off the circuits, I figure that the aforementioned "Jiffy" would be 3.34 x 10 to the -19th power second, approximately, as Spock would say.

The article described the attosecond as 10 to the -18th power second. Of course, the "jiffy" was never actually measured -- just conceived as a mathematical likelihood.
__________________
cmac

1986 300SDL, 351K
1984 300D, 133K

Last edited by cmac2012; 03-05-2006 at 07:19 PM.
Reply With Quote
  #5  
Old 03-05-2006, 01:02 AM
dkveuro's Avatar
Sword of Damocles
 
Join Date: Jun 2003
Location: Here an' there.
Posts: 2,548
Quote:
Originally Posted by cmac2012
......................................... My high school physics teacher used to say a "Jiffy" was the length of time it took light to travel one angstrom...........................
He was wrong...it's how long the oil tech takes to strip out your oil pan drain plug threads ........


.
__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."
Reply With Quote
  #6  
Old 03-05-2006, 07:18 PM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 19,567
Quote:
Originally Posted by dkveuro
He was wrong...it's how long the oil tech takes to strip out your oil pan drain plug threads ........
You've heard some stories about that, no doubt.
__________________
cmac

1986 300SDL, 351K
1984 300D, 133K
Reply With Quote
  #7  
Old 03-05-2006, 07:36 PM
dkveuro's Avatar
Sword of Damocles
 
Join Date: Jun 2003
Location: Here an' there.
Posts: 2,548
Quote:
Originally Posted by cmac2012
You've heard some stories about that, no doubt.
Are you kidding ? I have lost count of the number of times I get under with my wrench to find someone with gravel rash on their knuckles has bolted/crammed in, one of those 'fit's all' self threading drain bolts !




.
__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."
Reply With Quote
  #8  
Old 03-06-2006, 06:08 PM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 19,567
Yeah, I was ribbin' you. I figured you'd dealt with a few botched jobs in that category. I've run into that sort of "this bolt seems to go in tight" kind of crap working on old rigs. I run into it all the time in home repair where someone who didn't have a clue about how to proceed just gave me more work to do at a future date.

__________________
cmac

1986 300SDL, 351K
1984 300D, 133K
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:16 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page