My Math Forum torque and parity symmetry

 Physics Physics Forum

 November 3rd, 2007, 05:19 AM #1 Senior Member   Joined: Nov 2006 From: I'm a figment of my own imagination :? Posts: 848 Thanks: 0 torque and parity symmetry I'm slightly confused. I thought that parity (mirror-image) symmetry was only violated in weak force interactions. However the vector nature of angular acceleration and torque (mainly the fact that the direction of the vector is toward you when the object is rotating counter-clockwise) would tend to be a smoking gun for its violation (for example, if an object is rotating, you can tell whether or not the interaction is possible by observing the direction of the angular velocity). Can anyone clarify?
 November 3rd, 2007, 12:29 PM #2 Global Moderator   Joined: Dec 2006 Posts: 19,713 Thanks: 1806 There are lots of asymmetrical objects. If something moves the opposite way from what you'd expect, the opposite force (or torque) was applied. No problem.
 November 3rd, 2007, 08:04 PM #3 Senior Member   Joined: Nov 2006 From: I'm a figment of my own imagination :? Posts: 848 Thanks: 0 Objects can freely violate parity symmetry, but I was under the impression that physical laws generally do not (with the exception of weak force interactions). This is what surprises me about torque: it is possible to have an object rotating counterclockwise with the direction of torque toward you, but the mirror image is not possible. This impossibility is what I meant by a violation of parity symmetry.

 Tags parity, symmetry, torque

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post r-soy Physics 4 June 29th, 2012 09:28 AM benmuskler Physics 1 March 31st, 2012 08:13 AM FeebleBrain Applied Math 1 August 9th, 2011 04:58 AM Rutzer Number Theory 2 April 3rd, 2011 08:01 PM petesam Abstract Algebra 4 December 14th, 2008 12:48 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top