Happy Halloween

God & Science Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | God and Science | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Shift Symmetry.

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Alexander on March 21, 2002 04:10:29 UTC

Take infinite line and shift it in some distance, say, 1m in the direction parallel to the line - nothing will change with the line, right? This is what is called "symmetry versus shift in space".

Symmetry can be continuous (line above does not care if you shift it 1 m or 1 cm), or descrete (crystal is invariant only of you shift it nd meters, where n is any integer, d is the crystal lattice period).

Invariance vs shifts in time, position and direction is what we call energy, momentum and angular momentum conservation.

For more details where natural laws come from, see http://www/emmynoether.com/

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2020 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins